Map to Help Room (G2B90)

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Map to Help Room (G2B90)"

Transcription

1 Map to Help Room (G2B90) Lecture room Help room Homework Turn in your homework at the beginning of class next lecture. It will be collected shortly after lecture starts. Put your homework in the appropriate alphabetized box on the right side of the back of the lecture hall (the right as I would see it from the front) Please consider coming to office hours before ing us with homework questions. 1

2 Clickers Register your clicker at iclicker.com No exceptions if you are absent, forget your clicker, run out of batteries, etc. You do get more points for a correct answer, so try to figure it out! Chapter 1, continued Electromagnetic waves Is there a medium? What is wiggling? Electric and magnetic fields EM Spectrum Visible light Radio waves Microwaves Xrays Resonance Why do we only see some EM waves? Examples and demos Light sources Incandescent bulbs Fluorescent bulbs Other sources 2

3 White Light through a Prism 700 nm 400 nm A prism spreads out the over- lapping wavelengths in white light into different spatial locations where they can be seen as colors. Clicker Question Picture a rope with a pulse disturbance moving horizontally. How does the distance and direction traveled by pieces of the rope compare to the distance and direction traveled by the pulse? a) The rope piece travels more than the pulse, in the same direction b) The rope piece travels more than the pulse, at a right angle to the pulse c) The rope piece travels less than the pulse, in the same direction d) The rope piece travels less than the pulse, at a right angle to the pulse 3

4 Clicker Question Which is the correct light ray to describe how we see the apple? (the color of the arrow is not relevant) A B E D C Remember the light has to come from the bulb first, so B is not correct. C is the correct light ray Electromagnetic (EM) Waves Light is part of the Electromagnetic Spectrum Unlike sound or rope waves, EM waves do not need a material to transmit them, they can travel through empty space So what is actually wiggling in an EM wave? 4

5 Electric and Magnetic Fields Static electricity Magnetic field lines Electromagnetic Waves Made up of oscillating electric and magnetic fields 5

6 EM Waves: Key Points Waves can travel in empty space The oscillating fields are at right angles (perpendicular) to the direction of wave motion Electromagnetic Spectrum 6

7 Electromagnetic Spectrum Clicker Question The speed of light is 3 x 10 8 m/s A radio signal takes 2.5 x 10-3 s (2.5 milliseconds) to travel from Boston to DC. What is the distance between these cities? a) 1200 km b) 750 km c) 7500 km d) 500 km e) 1000 km distance =speed * time 3 x 10 8 m/s * 2.5 x 10-3 s 7.5 x 10 5 m 750 km 7

8 Images at different frequencies IR Radar UV White light Xray Millimeter Wave Scanning 8

9 Waves and Resonance Oscillating systems have a special frequency at which they like to vibrate, called the resonant frequency External driving of these systems at the resonant frequency will result in the most efficient transfer of energy Ex: Swings, rocking your car out of a snowbank, washboard ripples on a dirt road, shattering a crystal glass, dye bleaching, light perception in your eye, washing machine Example: Pendulum What happens when we change the length of the string? What happens when I change how fast I move my hand? The same process occurs in our eyes, which are not sensitive to frequencies outside what we call visible light 9

10 Effect of resonance produced by military helicopter blade going around at frequency resonant with the helicopter body What do resonances have to do with light? When light is absorbed by atoms we can think of this as a resonance For example, we see light rays of 470 nm coming into our eyes because this light excites a resonance in certain atoms inside our eyes EM waves with the wrong frequency do not excite the resonance, and we don t see them. Light can also be emitted by atoms, which is also a form of resonance This is how fluorescent lights, lasers and LEDs work. 10

11 Incandescent Light Bulbs Incandescent Light Bulbs Filament with current of electrons which hit into atoms causing light to be emitted Atom Electrons Atom Atom Light emitted at many different resonance frequencies of atoms appears as white light 11

12 Incandescent Light Bulbs A continuous light source Almost 90% of its emission is invisible to the human eye, producing heat and wasting energy Clicker Question The light from an ordinary incandescent light bulb appears white because a) A current of electrons excites a resonance in atoms at the frequency of white light. b) A current of electrons excites resonances in atoms at many different frequencies c) A current of electrons wiggles at the frequency of white light 12

13 Fluorescent Light Bulbs Fluorescent bulbs have a lower current and power usage for the same light output in the visible range How do they do this? The atoms inside a fluorescent bulb have ultraviolet resonant frequencies Atom Atom Electrons Atom Invisible ultraviolet light Phosphors white light 13

14 Fluorescent Light Bulbs Because the phosphors emit at very specific resonant frequencies, the spectrum is not continuous Incandescent vs. Fluorescent 14

15 Neon lights Produced the same way, but with a different set of atoms in the tube to produce the different colors. Light Emitting Diodes (LEDs) A semiconductor system Charges are initially separated An applied current pushes them up the hill, where they can recombine and emit light 15

16 Clicker Question What kind of bulbs do you think they use to keep food hot at a buffet bar? a) Incandescent b) Fluorescent c) Neon d) LEDs Color Temperature Light from ideal sources is generally a mixture of different wavelengths Think of the rainbow generated by sunlight The spectra of different light bulbs The mixture of wavelengths can be understood by asking how bright is the mixture at each wavelength How do these different formulations change the color of the light? 16

17 The hotter the source the more bluish the white light. The cooler the source the more reddish the white light These are curves of the intensity of each of the wavelengths present in an "off-white" light as the (color) temperature of the filament in the light bulb increases. Color Temperature in Fluorescent Lights Fluorescent light bulbs all feel the same temperature when you touch them, but the phosphors can be selected to simulate a specific color temperature. From 17

18 Here is how a picture changes under lighting with different color temperatures Higher color temp more bluish You can also change the color temperature in imaging processing software Lower color temp more reddish It's a good idea to remember some rough wavelengths associated with colors Violet and blue are what we see when shorter wavelength visible rays enter our eyes. They have relatively higher frequencies Red is how we see longer wavelength visible rays Red has a relatively smaller frequency 18

Light. Light. Overview. In-class activity. What are waves? In this section: PSC 203. What is it? Your thoughts?

Light. Light. Overview. In-class activity. What are waves? In this section: PSC 203. What is it? Your thoughts? Light PSC 203 Overview In this section: What is light? What is the EM Spectrum? How is light created? What can we learn from light? In-class activity Discuss your answers in groups of 2 Think of as many

More information

LIGHT CONCEPTS. Most light is invisible to our eyes. Light is a streaming code that tells about the chemical composition of its source

LIGHT CONCEPTS. Most light is invisible to our eyes. Light is a streaming code that tells about the chemical composition of its source ITS SECRETS REVEALED LIGHT CONCEPTS Most light is invisible to our eyes Light is a streaming code that tells about the chemical composition of its source Light from a glowing object can reveal its temperature

More information

Physics 1230: Light and Color

Physics 1230: Light and Color Physics 1230: Light and Color Instructor: Joseph Maclennan TOPIC 3 - Resonance and the Generation of Light http://www.colorado.edu/physics/phys1230 How do we generate light? How do we detect light? Concept

More information

Light bulbs. How does a light bulb work? Light bulbs. The goal of this class: Making sense of waves. Midterm 2 results. Ave: 31.8/40.

Light bulbs. How does a light bulb work? Light bulbs. The goal of this class: Making sense of waves. Midterm 2 results. Ave: 31.8/40. Light bulbs Midterm 2 results Number of people Ave: 31.8/40 Score out of 40 Lecture 17 : Incandescent light bulbs How they work Why they are inefficient Reminders: No HW was due yesterday HW for next week,

More information

Physics 221 Lab 14 Transformers & Atomic Spectra

Physics 221 Lab 14 Transformers & Atomic Spectra Physics 221 Lab 14 Transformers & Atomic Spectra Transformers An application of Inductance The point of a transformer is to increase or decrease the voltage. We will investigate a simple transformer consisting

More information

The Electromagnetic Spectrum

The Electromagnetic Spectrum The Electromagnetic Spectrum 1 Look around you. What do you see? You might say "people, desks, and papers." What you really see is light bouncing off people, desks, and papers. You can only see objects

More information

Light, Light Bulbs and the Electromagnetic Spectrum

Light, Light Bulbs and the Electromagnetic Spectrum Light, Light Bulbs and the Electromagnetic Spectrum Spectrum The different wavelengths of electromagnetic waves present in visible light correspond to what we see as different colours. Electromagnetic

More information

The Greenhouse Effect

The Greenhouse Effect The Greenhouse Effect THE GREENHOUSE EFFECT To understand the greenhouse effect you first need to know a bit about solar radiation what it is, where it comes from and what happens when it reaches Earth.

More information

The Cosmic Perspective Seventh Edition. Light and Matter: Reading Messages from the Cosmos. Chapter 5 Reading Quiz Clickers

The Cosmic Perspective Seventh Edition. Light and Matter: Reading Messages from the Cosmos. Chapter 5 Reading Quiz Clickers Reading Quiz Clickers The Cosmic Perspective Seventh Edition Light and Matter: Reading Messages from the Cosmos 5.1 Light in Everyday Life How do we experience light? How do light and matter interact?

More information

Light bulbs. Lightbulbs. How does a light bulb work? Light bulbs. Midterm 2 results. End of semester grade policy. Ave: 31.8/40.

Light bulbs. Lightbulbs. How does a light bulb work? Light bulbs. Midterm 2 results. End of semester grade policy. Ave: 31.8/40. Light bulbs Lightbulbs How many scientists does it take to change a lightbulb? Undergraduates: None right light - hurts... must go back to bed. Postgraduates: Funding for a new lightbulb ran out six months

More information

The Nature of Light. As a particle

The Nature of Light. As a particle The Nature of Light Light is radiant energy. Travels very fast 300,000 km/sec! Can be described either as a wave or as a particle traveling through space. As a wave A small disturbance in an electric field

More information

Light, Color, and the Greenhouse Effect

Light, Color, and the Greenhouse Effect IDS 101 Light, Color, and the Greenhouse Effect Imagine that you have a light source and some way to detect the intensity of light at various distances. If you increase the distance of the detector from

More information

Example: Water wave. Water just moves up and down Wave travels and can transmit energy (tsunami)

Example: Water wave. Water just moves up and down Wave travels and can transmit energy (tsunami) Waves R Us What are Waves? Waves: moving disturbances that transmit energy without the physical transport of material - waves in a pool or waves in a wheat field or waves of people in a football field.

More information

Lightbulbs. How does a lightbulb work? Lightbulbs. Electromagnetic radiation. End of semester grade policy. Electric Current

Lightbulbs. How does a lightbulb work? Lightbulbs. Electromagnetic radiation. End of semester grade policy. Electric Current Pressure Lecture 17 : Incandescent lightbulbs How they work Why they are inefficient Lightbulbs How many scientists does it take to change a lightbulb? Undergraduates: None Bright light - hurts... must

More information

The Wave Model of Light

The Wave Model of Light Light is part of the electromagnetic spectrum and travels in waves. Student Name Class The Wave Model of Light 1. A.crest B.rest position C.amplitude D.wavelength The arrows a) and b) -identified in the

More information

3. What are electromagnetic waves? Electromagnetic waves are transverse waves that have some electrical properties and some magnetic properties.

3. What are electromagnetic waves? Electromagnetic waves are transverse waves that have some electrical properties and some magnetic properties. CHAPTER 3 - THE ELECTROMAGNETIC SPECTRUM 3-1 The Nature of Electromagnetic Waves 1. What do all mechanical waves such as sound waves have in common? All mechanical waves such as sound waves transfer energy

More information

Physical Science Study Guide Unit 7 Wave properties and behaviors, electromagnetic spectrum, Doppler Effect

Physical Science Study Guide Unit 7 Wave properties and behaviors, electromagnetic spectrum, Doppler Effect Objectives: PS-7.1 Physical Science Study Guide Unit 7 Wave properties and behaviors, electromagnetic spectrum, Doppler Effect Illustrate ways that the energy of waves is transferred by interaction with

More information

Electromagnetic Spectrum

Electromagnetic Spectrum Electromagnetic Spectrum Why do some things have colors? What makes color? Why do fast food restaurants use red lights to keep food warm? Why don t they use green or blue light? Why do X-rays pass through

More information

How lasers work. The laser medium. Population Inversion. L 36 Modern Physics [2] Spontaneous vs Stimulated Emission.

How lasers work. The laser medium. Population Inversion. L 36 Modern Physics [2] Spontaneous vs Stimulated Emission. L 36 Modern Physics [2] How lasers work Medical applications of lasers Applications of high power lasers Medical imaging techniques CAT scans MRI s How lasers work First we must understand the difference

More information

11/15/2016. Electromagnetic (EM) waves are waves caused by oscillations occurring simultaneously in electric and magnetic fields

11/15/2016. Electromagnetic (EM) waves are waves caused by oscillations occurring simultaneously in electric and magnetic fields Electromagnetic (EM) waves are waves caused by oscillations occurring simultaneously in electric and magnetic fields A 2D transverse wave The EM and Visible Spectra They DO NOT require any medium in order

More information

Atomic Emission Spectra

Atomic Emission Spectra Atomic Emission Spectra Objectives The objectives of this laboratory are as follows: To build and calibrate a simple box spectroscope capable of measuring wavelengths of visible light. To use this spectroscope

More information

Grade 8 Science Chapter 4 Notes

Grade 8 Science Chapter 4 Notes Grade 8 Science Chapter 4 Notes Optics the science that deals with the properties of light. Light a form of energy that can be detected by the human eye. The History of Optics (3 Scientists): 1. Pythagoras

More information

From lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation?

From lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation? From lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation? From lowest energy to highest energy, which of the following correctly

More information

Review Vocabulary spectrum: a range of values or properties

Review Vocabulary spectrum: a range of values or properties Standards 7.3.19: Explain that human eyes respond to a narrow range of wavelengths of the electromagnetic spectrum. 7.3.20: Describe that something can be seen when light waves emitted or reflected by

More information

I. C O N T E N T S T A N D A R D S

I. C O N T E N T S T A N D A R D S Introductory Physics, High School Learning Standards for a Full First-Year Course I. C O N T E N T S T A N D A R D S 4. Waves Central Concept: Waves carry energy from place to place without the transfer

More information

v = fλ PROGRESSIVE WAVES 1 Candidates should be able to :

v = fλ PROGRESSIVE WAVES 1 Candidates should be able to : PROGRESSIVE WAVES 1 Candidates should be able to : Describe and distinguish between progressive longitudinal and transverse waves. With the exception of electromagnetic waves, which do not need a material

More information

Today. Electromagnetic Radiation. Light & beyond. Thermal Radiation. Wien & Stefan-Boltzmann Laws

Today. Electromagnetic Radiation. Light & beyond. Thermal Radiation. Wien & Stefan-Boltzmann Laws Today Electromagnetic Radiation Light & beyond Thermal Radiation Wien & Stefan-Boltzmann Laws 1 Electromagnetic Radiation aka Light Properties of Light are simultaneously wave-like AND particle-like Sometimes

More information

Chapter 5 Light and Matter: Reading Messages from the Cosmos

Chapter 5 Light and Matter: Reading Messages from the Cosmos Chapter 5 Light and Matter: Reading Messages from the Cosmos Messages Interactions of Light and Matter The interactions determine everything we see, including what we observe in the Universe. What is light?

More information

PS-7.2 Compare the nature and properties of transverse and longitudinal/compressional mechanical waves.

PS-7.2 Compare the nature and properties of transverse and longitudinal/compressional mechanical waves. PS-7.1 Illustrate ways that the energy of waves is transferred by interaction with matter (including transverse and longitudinal /compressional waves). Understand that a wave is a repeating disturbance

More information

Chapter 2 Electromagnetic Radiation

Chapter 2 Electromagnetic Radiation Chapter 2 Electromagnetic Radiation Bohr demonstrated that information about the structure of hydrogen could be gained by observing the interaction between thermal energy (heat) and the atom. Many analytical

More information

Announcements. Reading next class 5.7 Homework 6 due Wednesday. Exam 2 next week (Thursday) Inclusive there will be some SR.

Announcements. Reading next class 5.7 Homework 6 due Wednesday. Exam 2 next week (Thursday) Inclusive there will be some SR. Announcements Reading next class 5.7 Homework 6 due Wednesday. Exam 2 next week (Thursday) Inclusive there will be some SR. Modern physics Photons and PE Atomic spectra Bohr atom etc. Atoms/ Balmer/ Bohr

More information

Eighth Grade Electromagnetic Radiation and Light Assessment

Eighth Grade Electromagnetic Radiation and Light Assessment Eighth Grade Electromagnetic Radiation and Light Assessment 1a. Light waves are the only waves that can travel through. a. space b. solids 1b. Electromagnetic waves, such as light, are the only kind of

More information

Lecture 8: Radiation Spectrum. Radiation. Electromagnetic Radiation

Lecture 8: Radiation Spectrum. Radiation. Electromagnetic Radiation Lecture 8: Radiation Spectrum The information contained in the light we receive is unaffected by distance The information remains intact so long as the light doesn t run into something along the way Since

More information

Spectra of Lights: An Interactive Demonstration with Diffraction Gratings

Spectra of Lights: An Interactive Demonstration with Diffraction Gratings Grades: 4 th 12 th grade Purpose: Students will explore the properties of different types of light bulbs using diffraction grating glasses to reveal the light s unique spectra or fingerprint. The goal

More information

Ch 25 Chapter Review Q & A s

Ch 25 Chapter Review Q & A s Ch 25 Chapter Review Q & A s a. a wiggle in time is called? b. a wiggle in space & time is called? a. vibration b. wave What is the period of a pendulum? The period is the time for 1 cycle (back & forth)

More information

Things That Glow In The Dark Classroom Activities That Explore Spectra and Fluorescence

Things That Glow In The Dark Classroom Activities That Explore Spectra and Fluorescence Things That Glow In The Dark Classroom Activities That Explore Spectra and Fluorescence Linda Shore lindas@exploratorium.edu Hot Topics: Research Revelations from the Biotech Revolution Saturday, April

More information

Chapter 2: Electromagnetic Radiation Radiant Energy I

Chapter 2: Electromagnetic Radiation Radiant Energy I Chapter 2: Electromagnetic Radiation Radiant Energy I Goals of Period 2 Section 2.1: To introduce electromagnetic radiation Section 2.2: To discuss the wave model of radiant energy Section 2.3: To describe

More information

After a wave passes through a medium, how does the position of that medium compare to its original position?

After a wave passes through a medium, how does the position of that medium compare to its original position? Light Waves Test Question Bank Standard/Advanced Name: Question 1 (1 point) The electromagnetic waves with the highest frequencies are called A. radio waves. B. gamma rays. C. X-rays. D. visible light.

More information

Rigorous Curriculum Design Unit Planning Organizer

Rigorous Curriculum Design Unit Planning Organizer 1 Rigorous Curriculum Design Unit Planning Organizer Subject(s) Science Grade/Course 6 Unit of Study Forces and Motion Pacing Minimum 15 days, Maximum 20 days Priority Essential Standards 6.P.1 Understand

More information

Physics Open House. Faraday's Law and EM Waves Change in the magnetic field strength in coils generates a current. Electromagnetic Radiation

Physics Open House. Faraday's Law and EM Waves Change in the magnetic field strength in coils generates a current. Electromagnetic Radiation Electromagnetic Radiation (How we get most of our information about the cosmos) Examples of electromagnetic radiation: Light Infrared Ultraviolet Microwaves AM radio FM radio TV signals Cell phone signals

More information

Section 1 Electromagnetic Waves

Section 1 Electromagnetic Waves Section 1 Electromagnetic Waves What are electromagnetic waves? What do microwaves, cell phones, police radar, television, and X-rays have in common? All of them use electromagnetic waves Electromagnetic

More information

Electromagnetic Radiation and Atomic Physics

Electromagnetic Radiation and Atomic Physics Electromagnetic Radiation and Atomic Physics Properties of Electrons, Protons, and Neutrons (The Main Constituents of Ordinary Matter) Mass Electrons have a mass of 9.11 10-31 kg. The mass of a proton

More information

Choosing the Right Light

Choosing the Right Light Choosing the Right Light ENERGY STAR qualified CFLs and Colour CFLs are available in a wide variety of shades of white light, ranging from yellowish to white to bluish white light, which allows you to

More information

Introduction to Waves. Auto slide change for this page, WAIT..

Introduction to Waves. Auto slide change for this page, WAIT.. Introduction to Waves Auto slide change for this page, WAIT.. Part A Part B Part C Part D Part E : Definition The basics - Definition of waves. - Basic Properties of waves. : Types of Waves and Terminology.

More information

Waves Review Checklist Pulses 5.1.1A Explain the relationship between the period of a pendulum and the factors involved in building one

Waves Review Checklist Pulses 5.1.1A Explain the relationship between the period of a pendulum and the factors involved in building one 5.1.1 Oscillating Systems Waves Review hecklist 5.1.2 Pulses 5.1.1A Explain the relationship between the period of a pendulum and the factors involved in building one Four pendulums are built as shown

More information

Description: Vocabulary: Objectives: Materials: Safety:

Description: Vocabulary: Objectives: Materials: Safety: Title: Spectral Analysis with DVDs and CDs Author: Brendan Noon Date Created: Summer 2011 Subject: Physics/Chemistry/Earth Science Grade Level: 9-12 Standards: Standard 1: Analysis, Inquiry, and Design

More information

Unit Study Guide: Waves and Heat Transfer

Unit Study Guide: Waves and Heat Transfer Name Date Per Unit 8.4.1 Study Guide: Waves and Heat Transfer I Can Statements I Can Statements are the learning targets for each unit. By the time you take the test for this unit, you should be able to

More information

Light and Other Radiations

Light and Other Radiations Light and Other Radiations Visible light is a form of electromagnetic radiation. X-rays, infrared, microwaves and gamma rays are other forms of this type of radiation which make up the electromagnetic

More information

Teacher Guide. Including Student Activities. Module 7: Demonstrating Properties of Electromagnetic Radiation

Teacher Guide. Including Student Activities. Module 7: Demonstrating Properties of Electromagnetic Radiation Teacher Guide Including Student Activities Module 7: Demonstrating Properties of Electromagnetic Radiation ACTIVITY GUIDE Module 7: Demonstrating Properties of Electromagnetic Radiation Summary: Electromagnetic

More information

Electromagnetic Radiation and Atomic Spectra POGIL

Electromagnetic Radiation and Atomic Spectra POGIL Name _Key AP Chemistry Electromagnetic Radiation and Atomic Spectra POGIL Electromagnetic Radiation Model 1: Characteristics of Waves The figure above represents part of a wave. The entire wave can be

More information

BUILDING A SPECTROSCOPE

BUILDING A SPECTROSCOPE grades 6 1 2 Objective Build a simple, pocket-sized spectroscope from readily available materials and use it to examine different kinds of light sources in school, at home, and around the city. Introduction

More information

Electromagnetic Radiation (including visible light)

Electromagnetic Radiation (including visible light) An expert is a man who has made all the mistakes, which can be made in a narrow field. Neils Bohr Electromagnetic Radiation (including visible light) Behaves like a particle. light particles are called

More information

Prepared by Martin WU Kwok-tin, BSE/EEA2/1 Energy Efficiency Office, Electrical and Mechanical Services Department (August 2003)

Prepared by Martin WU Kwok-tin, BSE/EEA2/1 Energy Efficiency Office, Electrical and Mechanical Services Department (August 2003) Interference Problems of Fluorescent Lamps Operating on High Frequency Electronic Ballasts with Infrared Remote Control Equipment and Infrared Simultaneous Interpretation System Prepared by Martin WU Kwok-tin,

More information

III. Radiation and the Greenhouse Effect

III. Radiation and the Greenhouse Effect III. Radiation and the Greenhouse Effect A. The electromagnetic spectrum consists of radiation we can see (visible light, the colors of the rainbow), radiation we can feel (the infrared), radiation we

More information

Experiment 1: Grating Spectroscope

Experiment 1: Grating Spectroscope SPECTRA White light is a mixture of all wavelengths. When white light is sent through a prism or a diffraction grating it is broken up into a continuous distribution of colors called a spectrum. The relation

More information

Spectra in the Lab ATOMS AND PHOTONS

Spectra in the Lab ATOMS AND PHOTONS Spectra in the Lab Every chemical element has a unique ``signature'' which can be revealed by analyzing the light it gives off. This is done by spreading the light out into a rainbow of color. It may seem

More information

FXA 2008. Candidates should be able to :

FXA 2008. Candidates should be able to : ELECTROMAGNETIC WAVES AND THE ELECTROMAGNETIC SPECTRUM 1 Candidates should be able to : State typical values for the wavelengths of the different regions of the electromagnetic spectrum from radio waves

More information

A It is halved. B It is doubled. C It is quadrupled. D It remains the same.

A It is halved. B It is doubled. C It is quadrupled. D It remains the same. WAVES UNIT REVIEW EN: CALIFORNIA STATE QUESTIONS: 1. A sound wave is produced in a metal cylinder by striking one end. Which of the following occurs as the wave travels along the cylinder? A Its amplitude

More information

How is E-M Radiation Produced?

How is E-M Radiation Produced? How is E-M Radiation Produced? 1. Accelerate charged particle back and forth like they do at the radio station. 2. All solids or liquids with temperature above Absolute Zero emit E-M radiation. Absolute

More information

The Electromagnetic Spectrum and Observing for Educators

The Electromagnetic Spectrum and Observing for Educators YAAYS course: The Electromagnetic Spectrum and Observing for Educators February 19, 2008 Rich Kron from last week: visible light, radio, infrared, X-rays etc. are all electromagnetic radiation, differing

More information

Atomic Emission Spectra

Atomic Emission Spectra EXPERIMENT Atomic Emission Spectra 0 Prepared by Zach Gray and Edward L. Brown, Lee University Students will observe the emission spectra of various atoms both visually and with a direct reading spectroscope.

More information

Chapter 19 Vibrations and Waves

Chapter 19 Vibrations and Waves Chapter 19 Vibrations and Waves Vibration of a pendulum Wave Description Wave Motion Transverse Waves Longitudinal Waves 1 General definitions of vibrations and waves Vibration: in a general sense, anything

More information

Electron Energy and Light

Electron Energy and Light Why? Electron Energy and Light How does light reveal the behavior of electrons in an atom? From fireworks to stars, the color of light is useful in finding out what s in matter. The emission of light by

More information

Minimizing Light Damage to Artifacts. Courtesy Wyoming State Museum

Minimizing Light Damage to Artifacts. Courtesy Wyoming State Museum Minimizing Light Damage to Artifacts Courtesy Wyoming State Museum What You Will Learn This short tutorial will discuss different kinds of light damage and how they are created. It will also recommend

More information

Conceptual Physics Review (Chapters 25, 26, 27 & 28) Chapter 25 Describe the period of a pendulum. Describe the characteristics and properties of

Conceptual Physics Review (Chapters 25, 26, 27 & 28) Chapter 25 Describe the period of a pendulum. Describe the characteristics and properties of Conceptual Physics Review (Chapters 25, 26, 27 & 28) Solutions Chapter 25 Describe the period of a pendulum. Describe the characteristics and properties of waves. Describe wave motion. Describe factors

More information

Physics 1230: Light and Color

Physics 1230: Light and Color Physics 1230: Light and Color Exam 1 is tomorrow, Wed. June 9, in class. Covers material from Chapter 1, pgs 1-25, Lectures and Homework 1-3. HW4 will be up soon. Due Thursday, 5PM Lecture 5: Shadows,

More information

WAVES AND ELECTROMAGNETIC RADIATION

WAVES AND ELECTROMAGNETIC RADIATION WAVES AND ELECTROMAGNETIC RADIATION All waves are characterized by their wavelength, frequency and speed. Wavelength (lambda, ): the distance between any 2 successive crests or troughs. Frequency (nu,):

More information

3-1. True or False: Different colors of light are waves with different amplitudes. a.) True b.) False X

3-1. True or False: Different colors of light are waves with different amplitudes. a.) True b.) False X 3-1. True or False: Different colors of light are waves with different amplitudes. a.) True b.) False X 3-2. True or False: Different colors of light are waves with different wavelengths. a.) True X b.)

More information

Properties of Light By Cindy Grigg

Properties of Light By Cindy Grigg Properties of Light By Cindy Grigg 1 Light is one form of energy that travels in electromagnetic waves. This energy is both magnetic and electrical. 2 There are many different types of electromagnetic

More information

5. The Nature of Light. Does Light Travel Infinitely Fast? EMR Travels At Finite Speed. EMR: Electric & Magnetic Waves

5. The Nature of Light. Does Light Travel Infinitely Fast? EMR Travels At Finite Speed. EMR: Electric & Magnetic Waves 5. The Nature of Light Light travels in vacuum at 3.0. 10 8 m/s Light is one form of electromagnetic radiation Continuous radiation: Based on temperature Wien s Law & the Stefan-Boltzmann Law Light has

More information

Experiment 13 ~ Diffraction, Wavelength, and Atomic Line Spectra

Experiment 13 ~ Diffraction, Wavelength, and Atomic Line Spectra Experiment 13 ~ Diffraction, Wavelength, and Atomic Line Spectra Part 1 1.1. Atomic Line Spectra. In this experiment, we will look at the diffraction of light, and how wavelengths can be calculated from

More information

physics 112N electromagnetic waves

physics 112N electromagnetic waves physics 112N electromagnetic waves electromagnetic waves? Faraday s law told us that time-varying magnetic fields generate electric fields James Clerk Maxwell found that time-varying electric fields generate

More information

COLLEGE PHYSICS. Chapter 29 INTRODUCTION TO QUANTUM PHYSICS

COLLEGE PHYSICS. Chapter 29 INTRODUCTION TO QUANTUM PHYSICS COLLEGE PHYSICS Chapter 29 INTRODUCTION TO QUANTUM PHYSICS Quantization: Planck s Hypothesis An ideal blackbody absorbs all incoming radiation and re-emits it in a spectrum that depends only on temperature.

More information

Lab 19. Wave Properties How Do Frequency, Amplitude, and Wavelength of a Transverse Wave Affect Its Energy?

Lab 19. Wave Properties How Do Frequency, Amplitude, and Wavelength of a Transverse Wave Affect Its Energy? Lab Handout Lab 19. Wave Properties How Do Frequency, Amplitude, and Wavelength of a Transverse Wave Affect Its Energy? Introduction Energy can be transported by waves. There are many forms of waves that

More information

Chapter 6 Electromagnetic Radiation and the Electronic Structure of the Atom

Chapter 6 Electromagnetic Radiation and the Electronic Structure of the Atom Chapter 6 In This Chapter Physical and chemical properties of compounds are influenced by the structure of the molecules that they consist of. Chemical structure depends, in turn, on how electrons are

More information

THE EFFECT OF COLOUR FILTERS ON SOLAR PANELS. Katie Fitzgerald Expo Project Grade 7

THE EFFECT OF COLOUR FILTERS ON SOLAR PANELS. Katie Fitzgerald Expo Project Grade 7 THE EFFECT OF COLOUR FILTERS ON SOLAR PANELS Katie Fitzgerald Expo Project Grade 7 OBSERVATION By using a solar light instead of electricity, one can assist in lightening the load on our environment. By

More information

What are the different forms of energy?

What are the different forms of energy? Lesson 1 Heat Lesson 2 Sound Lesson 3 Light Lesson 4 Electricity What are the different forms of energy? Lesson 5 Magnetism heat temperature conduction convection radiation thermal conductivity What is

More information

Lecture 2: Radiation/Heat in the atmosphere

Lecture 2: Radiation/Heat in the atmosphere Lecture 2: Radiation/Heat in the atmosphere TEMPERATURE is a measure of the internal heat energy of a substance. The molecules that make up all matter are in constant motion. By internal heat energy, we

More information

Absorption and Fluorescence of Light

Absorption and Fluorescence of Light Background: Absorption and Fluorescence of Light Light travels from here to there like a really fast bullet. When we see a light turn on, there are particles of light called photons that travel from the

More information

Light and Spectra. COLOR λ, nm COLOR λ, nm violet 405 yellow 579 blue 436 orange 623 green 492 red 689

Light and Spectra. COLOR λ, nm COLOR λ, nm violet 405 yellow 579 blue 436 orange 623 green 492 red 689 Light and Spectra INTRODUCTION Light and color have intrigued humans since antiquity. In this experiment, you will consider several aspects of light including: a. The visible spectrum of colors (red to

More information

Amplitude Y is the maximum value of the wave variable ( displacement in this case ).

Amplitude Y is the maximum value of the wave variable ( displacement in this case ). NATURE OF VISIBLE LIGHT: Our current knowledge is that light exhibits a dual nature or behavior. It behaves as electromagnetic ( EM for short ) waves or as a particles ( photons ). General description

More information

Introduction to Waves. Essential Question: What are the characteristics of mechanical and electromagnetic waves? (S8P4a,d,f)

Introduction to Waves. Essential Question: What are the characteristics of mechanical and electromagnetic waves? (S8P4a,d,f) Introduction to Waves Essential Question: What are the characteristics of mechanical and electromagnetic waves? (S8P4a,d,f) Use the PowerPoint to fill in the Waves graphic organizer as we discuss the characteristics

More information

Heating the Atmosphere. Dr. Michael J Passow

Heating the Atmosphere. Dr. Michael J Passow Heating the Atmosphere Dr. Michael J Passow Heat vs. Temperature Heat refers to energy transferred from one object to another Temperature measures the average kinetic energy in a substance. When heat energy

More information

Introduction to spectroscopy

Introduction to spectroscopy Introduction to spectroscopy How do we know what the stars or the Sun are made of? The light of celestial objects contains much information hidden in its detailed color structure. In this lab we will separate

More information

Chapter 10: Waves. Waves. Waves (2) Examples of waves. Compression Waves. Shear (transverse) Waves

Chapter 10: Waves. Waves. Waves (2) Examples of waves. Compression Waves. Shear (transverse) Waves Chapter 10: Waves Chapter 13 Waves Demo: Shive wave machine 1. disturbances that travel from one place to another (pulse, but is often periodic) -pressure -displacement -light 2. initiated by a source

More information

LIGHT AND ELECTROMAGNETIC RADIATION

LIGHT AND ELECTROMAGNETIC RADIATION LIGHT AND ELECTROMAGNETIC RADIATION Light is a Wave Light is a wave motion of radiation energy in space. We can characterize a wave by three numbers: - wavelength - frequency - speed Shown here is precisely

More information

MECHANICS PROJECTILE MOTION

MECHANICS PROJECTILE MOTION 1 MECHANICS PROJECTILE MOTION When an object is in free fall, the object is at an acceleration of 10m/s down Displacement is the straight line from start to finish in that direction Projectile: An object

More information

Waves. Wave: A traveling disturbance consisting of coordinated vibrations that transmit energy with no net movement of the matter.

Waves. Wave: A traveling disturbance consisting of coordinated vibrations that transmit energy with no net movement of the matter. Waves Wave: A traveling disturbance consisting of coordinated vibrations that transmit energy with no net movement of the matter. Source: some kind of disturbance from the state of equilibrium. Propagation:

More information

Science In Action 8 Unit C - Light and Optical Systems. 1.1 The Challenge of light

Science In Action 8 Unit C - Light and Optical Systems. 1.1 The Challenge of light 1.1 The Challenge of light 1. Pythagoras' thoughts about light were proven wrong because it was impossible to see A. the light beams B. dark objects C. in the dark D. shiny objects 2. Sir Isaac Newton

More information

Light as a Wave. The Nature of Light. EM Radiation Spectrum. EM Radiation Spectrum. Electromagnetic Radiation

Light as a Wave. The Nature of Light. EM Radiation Spectrum. EM Radiation Spectrum. Electromagnetic Radiation The Nature of Light Light and other forms of radiation carry information to us from distance astronomical objects Visible light is a subset of a huge spectrum of electromagnetic radiation Maxwell pioneered

More information

Periodic Wave Phenomena

Periodic Wave Phenomena Name: Periodic Wave Phenomena 1. The diagram shows radar waves being emitted from a stationary police car and reflected by a moving car back to the police car. The difference in apparent frequency between

More information

Introduction to Spectroscopy.

Introduction to Spectroscopy. Introduction to Spectroscopy. ARCHIMEJ TECHNOLOGY The SPECTROSCOPY 2.0 Company To understand what the core of our project is about, you need to grasp some basic notions of optical spectroscopy. This lesson

More information

Electromagnetic (EM) waves. Electric and Magnetic Fields. L 30 Electricity and Magnetism [7] James Clerk Maxwell (1831-1879)

Electromagnetic (EM) waves. Electric and Magnetic Fields. L 30 Electricity and Magnetism [7] James Clerk Maxwell (1831-1879) L 30 Electricity and Magnetism [7] ELECTROMAGNETIC WAVES Faraday laid the groundwork with his discovery of electromagnetic induction Maxwell added the last piece of the puzzle Heinrich Hertz made the experimental

More information

How is LASER light different from white light? Teacher Notes

How is LASER light different from white light? Teacher Notes How is LASER light different from white light? Teacher Notes Concepts: (1) Light is a type of energy that travels as waves. [6.2.3.1.1] (2) Laser light is different from traditional light sources and must

More information

Pre-Lab Assignment: Interference, Measuring Wavelengths, and Atomic Spectra

Pre-Lab Assignment: Interference, Measuring Wavelengths, and Atomic Spectra Name: Lab Partners: Date: Pre-Lab Assignment: Interference, Measuring Wavelengths, and Atomic Spectra (Due at the beginning of lab) Directions: Read over the lab handout and then answer the following questions

More information

Light is a type of electromagnetic (EM) radiation, and light has energy. Many kinds of light exist. Ultraviolet (UV) light causes skin to tan or burn.

Light is a type of electromagnetic (EM) radiation, and light has energy. Many kinds of light exist. Ultraviolet (UV) light causes skin to tan or burn. Light and radiation Light is a type of electromagnetic (EM) radiation, and light has energy. Many kinds of light exist. Ultraviolet (UV) light causes skin to tan or burn. Infrared (IR) light is used in

More information

Bronx High School of Science Regents Physics

Bronx High School of Science Regents Physics Bronx High School of Science Regents Physics 1. Orange light has a frequency of 5.0 10 14 hertz in a vacuum. What is the wavelength of this light? (A) 1.5 10 23 m (C) 6.0 10 7 m (B) 1.7 10 6 m (D) 2.0

More information

Energy Pathways in Earth s Atmosphere

Energy Pathways in Earth s Atmosphere BRSP - 10 Page 1 Solar radiation reaching Earth s atmosphere includes a wide spectrum of wavelengths. In addition to visible light there is radiation of higher energy and shorter wavelength called ultraviolet

More information

3 sensitive heat sensors connected to a data logger (Or thermometers with the bulbs painted black) Thermometers

3 sensitive heat sensors connected to a data logger (Or thermometers with the bulbs painted black) Thermometers Student Sheet In this practical I will be: Repeatedly measuring the temperature of thermometers placed throughout the spectrum of light, and. Calculating the mean change in temperature for colours in the

More information

THE NATURE OF LIGHT AND COLOR

THE NATURE OF LIGHT AND COLOR THE NATURE OF LIGHT AND COLOR THE PHYSICS OF LIGHT Electromagnetic radiation travels through space as electric energy and magnetic energy. At times the energy acts like a wave and at other times it acts

More information