1 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 that affect the speed of a wave. Distinguish between transverse and longitudinal waves, and be able to give an example of each. Distinguish between constructive and destructive interference. Describe how a standing wave occurs. Describe the Doppler effect for sound. Describe sonic booms. Be able to define all vocabulary words in bold from the chapter. Chapter 26 Describe the relationship between a sound wave s frequency and pitch. Describe the movement of sound through air. Compare the transmission of sound through air with that through solids, liquids, and a vacuum. Describe factors that affect the speed of sound. Describe loudness and sound intensity. Know the range of frequencies that a human can hear Determine the relative intensities of two sounds from their respective decibel levels. Describe natural frequency. Describe resonance. Describe beats. Be able to define all vocabulary words in bold from the chapter. Chapter 27 Describe the dual nature of light. What produces light (electromagnetic waves)? Define photons and identify which theory of light they provide evidence for. Explain why it is difficult to measure the speed of light. Know what a light-year is Know the different portions of the electromagnetic spectrum and how they each relate to each other in terms of wavelength and frequency. Describe opaque materials. Describe solar and lunar eclipses. Distinguish between umbra and penumbra. Describe polarization. Know the speed of light in meters per second and kilometers per second. Explain why sound waves move faster through steel than through air, while light waves travel more slowly in any medium than through a vacuum.
2 Chapter 28 Explain why white and black are not true colors. Describe what factors affect the color of an object. Describe what determined whether a material reflects, transmits, or absorbs light of a certain color, in terms of the frequency of that color of light. Identify the three primary colors of light, and what secondary colors are formed by combining any two of them in equal proportions. Describe white light. Define complementary colors. Identify the three primary pigments by name, and identify which of the primary colors of light each pigments absorbs and reflects. Describe the difference between color mixing by addition and color mixing by subtraction. Labs Review the Pendulum Lab. Review the Mechanical Waves Lab. Review the Speed of Sound Lab. Homework Assignments Review all written assignments out of your textbook. Review all reading quizzes. Review all worksheets. Review all class notes and challenge problems worked during class.
3 Sample Calculations 1. What is the frequency, in hertz, that corresponds to each of the following periods? a) 0.10 sec f = = = 10Hz T 0.10s b) 5 secs f = = = 0. Hz T 5s 2 1 c) 60 sec f = = = T 1 s 60Hz 60 5 d) 24 hours f = = = 1.16x10 Hz T ' 60min $ ' 60sec $ 24hr% "% " & 1hr #& 1min # 3 e) 12 mins f = = = 1.39x10 Hz T ' 60sec $ 12 min% " & 1min # 2. What is the period, in seconds, that corresponds to each of the following frequencies? a) 10 Hz T = = = 0.1sec f 10Hz b) 0.2 Hz T = = = 5sec f 0.2Hz c) 60 Hz T = = = 0.017sec f 60Hz d) x 10-5 Hz T = = = 86,400sec 5 f x10 Hz 7 e) 2.3 MHz T = = = 4.35x10 sec 6 f 2.3x10 Hz 3. A metronome is set so that it makes ten complete vibrations in 12 seconds. Find the frequency of the metronome. The problem gives information that tells us the period of the vibration of the metronome is 12/10 or 1.2 seconds. Frequency and period are reciprocals of each other, so the frequency of the metronome is 10/12 or 8.3 x 10-1 Hz. 4. While sitting on a pier, Carlos notices that incoming waves are 2.0 m between crests. If the waves lap against the pier every 5.0 s, find the a) frequency of the waves Frequency is the number of waves passing a given point per second. Here, the waves lap against the pier every 5.0 sec, meaning the period of the wave is 5.0 sec. The frequency is the reciprocal of period, which is 0.2 Hz. b) speed of the waves v = λf = ( 2.0m) ( 0.2Hz) = 0.4 m s 5. Light travels at a speed of 3 x 10 8 m/s in a vacuum, and for practical purposes, through air as well. The wavelength of a shade of yellow light is 5.80 x m. Find the frequency of this light. v = λf, so f = v λ = 3.00x108 m s 5.80x10 11 m = 5.17x1018 Hz
4 6. A gamma ray is high-frequency light. Find the wavelength of a gamma ray with a frequency of Hz. c = λf, so λ = c f = 3.00x108 m s 1x10 22 Hz = 3x10 14 m or 30 femtometers 7. If the speed of a longitudinal sound wave is 340 m/s, and the frequency is 1000 Hz, what is the wavelength of the wave? v = λf, so λ = v f = 340 m s 1000Hz = 0.34m 8. The Sears Building in Chicago sways back and forth at a frequency of about 0.1 Hz. What is its period of vibration? p = 1 f = 1 0.1Hz =10sec 9. If a train of freight cars, each 10 m long, rolls by you at the rate of 2 cars each second, what is the speed of the train? Conceptually, 2 cars of 10 meters each pass by a given point in one second. Therefore, the speed must be 2x10=20 meters per second. Or, using a wave speed equation, v = λf = ( 10m) ( 2Hz) = 20m s 10. If a wave with wavelength 10 m has a frequency of 2 Hz, what is the wave speed? v = λf = ( 10m) ( 2Hz) = 20m s 11. If a water wave vibrates up and down two times each second and the distance between wave crests is 1.5 meters, find each of the following: a) the frequency of the wave Frequency is the number of vibrations or cycles per second. Since we are told that this wave vibrates up and down (one cycle) two times each second, the frequency is 2 Hz. b) the wavelength of the wave Wavelength is the distance between successive identical parts of a wave. Since we are told that the distance between successive crests is 1.5 meters, the wavelength is 1.5 meters. c) the speed of the wave v = λf = ( 1.5m) ( 2Hz) = 3m s 12. Is it possible for one wave to cancel another wave so that the combined amplitude is zero? Explain your answer. Yes, this phenomenon is called destructive interference. When the crest of one wave completely overlaps with the trough of another wave of identical amplitude, the crest of the first completely fills in the trough of the other, resulting in zero amplitude. 13. Is the Doppler effect an apparent change in speed or frequency of a wave, due to the motion of the source relative to the receiver? The Doppler effect is an apparent change in frequency of a wave. While the wave source creates waves of a constant speed, the motion of either the source or the receiver causes a change in the frequency with which the waves reach the receiver.
5 14. Find the frequency of a sound wave that has a wavelength of 1.5 meters. Could you hear this sound? v = λf, so f = v λ = 340m s 227Hz Yes, I could probably hear this sound, since most 1.5m humans can hear any sounds between 20 Hz and 20,000 Hz. 15. Your teacher says Hello to you from across the gym, 34 m away. How long does it take the sound to reach you? This problem gives a distance that sound travels, which is NOT a wavelength, as far as we know. I will NOT use the formula involving wavelength and frequency. Instead, I will use the familiar equation d = vt. d = vt, so t = d v = 34m 340m s = 0.1sec 16. Imagine a hiker camping in the mountains. Just before going to sleep he yells WAKE UP, and the sound echoes off the nearest mountain, returning 8 hours later. How far away is that mountain? The sound the hiker makes travels to the nearest mountain and back to the hiker s position, which takes a total time of 8 hours. This means that the sound travels the distance TO the mountain in 4 hrs, and spends the other 4 hrs traveling back again. To find the distance to the mountain, use 4 hrs as the time. " d = vt = ( 340 m s) 4hrsx 60min x 60sec % $ ' = 4,896,000m OR 4.9Mm # 1hr 1min & 17. Suppose that you put your left ear down against a railroad track, and your friend one kilometer away strikes the track with a hammer. How much sooner will the sound get to your left ear than to your right ear? The speed of sound is about 5950 m/s in steel and 340 m/s in air. The question asks how much sooner, which means we need to find the two different times for the sound to travel through the steel railroad track and through the air, both for a distance of 1 km. Once we have these two times, we will subtract in order to answer the question. Time for sound to travel through the track: d = vt, so t = d v = 1x103 m 5950m s = 0.168sec Time for sound to travel through the air: d = vt, so t = d v = 1x103 m = 2.94 sec 340 m s So, the difference is 2.94 sec sec = 2.77 sec. It will take 2.77 sec longer for the sound to get to my right ear. 18. Radio station WKLB in Boston broadcasts at a frequency of 99.5 MHz. What is the wavelength of the radio waves emitted by WKLB? c = λf, so λ = c f = 3.00x108 m s 99.5x10 6 Hz = 3.01m 19. How much more intense is the average factory (90 db) to normal speech (60 db)? 10 3 = 1000 times more intense
6 20. A pendulum s natural frequency is one full back-and-forth swing every 2 seconds. For maximum amplitude, how often should the pendulum bob be pushed? Express your answer in terms of time and also as a frequency, in Hz. For maximum amplitude, the frequency of the forced vibration (the push) should exactly match the natural frequency of the pendulum. This means that the bob should be pushed once every 2 seconds, or with a frequency of 0.5 Hz. a) Would the pendulum continue to swing at this natural frequency if it were pushed only half as frequently? If it were pushed only half as frequently, each push would still coincide with a natural swing of the pendulum. It would continue to swing, but would not achieve maximum amplitude. b) What about if it were pushed with twice the frequency? If it were pushed with twice the frequency, every other push would be in a direction opposed to the natural swing of the pendulum, meaning it would not continue to swing (vibrate) at its natural frequency. 21. In order to create beats, should two sound waves be of the same frequency or of different frequencies? Why? Beats result from interference of two waves of slightly different frequencies. As they interfere, the vibrations will sometimes reinforce as they undergo constructive interference, and then they will undergo destructive interference. What humans hear, is a single pitch that alternates between loud (constructive interference) and soft (destructive interference). 22. Two notes of frequencies of 110 Hz and 140 Hz are sounded together. What is the resulting beat frequency? Would you be able to hear the beats? If not, why not? If so, what would they sound like? The resulting beat frequency is 30 Hz. You probably would not be able to hear them because most humans cannot distinguish beat frequencies greater than 10 Hz. 23. If a baby cries at a db level of 110 db and a firecracker has a db value of 150, how many babies would have to be crying to be as intense as the sound from a firecracker? 150 db is 10 4 times more intense than 110 db, therefore, 10,000 babies would have to be crying! 24. If you owe me $50, and you only pay me $45, by how much money were you short? What percentage is this of the amount you owed me? This percentage is equivalent to a percent error. You were ($50-$45) = $5 short. (5/50) *100 = 10% 25. Assume that the actual speed of sound at a given temperature is 340 m/s and that you do an experiment to calculate the speed of sound using echo reflection. If your experimentally determined speed of sound is 335 m/s, what is your percent error in the experiment? Show your work!!! 340m /s 335m /s *100% =1.5% 340m /s
7 26. For each of the following pairs, identify which has the longer wavelength and identify which has the higher frequency: a. radio waves vs. gamma rays Radio waves have longer wavelength and gamma rays have higher frequency. b. ultraviolet radiation vs. microwaves Microwaves have longer wavelengths and UV radiation has higher frequency. c. microwaves vs. X-rays Microwaves have longer wavelengths and X-rays have higher frequency. d. visible light waves vs. infrared radiation IR radiation has longer wavelengths and visible light has greater frequency. e. gamma rays vs. visible light waves Visible light has longer wavelengths and gamma rays have higher frequency. f. X-rays vs. radio waves Radio waves have longer wavelengths and X-rays have higher frequency. 27. How long does it take for light from the sun to reach Earth if the sun is 1.50 x m away? Show your calculation!! d = vt, so t = d/v. t = 1.5x1011 m 3.00x10 8 m /s = 500s 28. When you look at a distant star or planet, you are looking back in time. How far back in time are you looking when you observe Pluto through the telescope from a distance of 5.91 x m? t = d/v t = 5.91x1012 m 3.00x10 8 m /s = 1.97 x 104 s 29. If a person could travel at the speed of light, it would still take 4.3 years to reach the nearest star, Proxima Centauri. How far away, in meters, is Proxima Centauri? (Ignore any relativistic effects.) d = vt d = 3.00x10 8 m s 3600s 1hrs 24hrs 1day 365days 1yr 4.3yrs = 4.07x10 16 m OR d = 9.46 x m/yr * 4.3yrs = 4.07 x m 30. The wavelength of green light is about 500 nm. What is the frequency of this light? f = v λ 500nm x 10-9 m/nm = 5.00x10-7 m 3.00x10 8 m /s 5.00x10 7 m = 6.00x1014 Hz
8 31. When electromagnetic waves travel through a medium such as glass, what happens to the speed of the waves? What happens to the frequency? What happens to the wavelength? The speed of the wave slows down in glass, but the frequency remains constant. This means the wavelength must get shorter, because speed = wavelength x frequency. 32. Draw a sketch (not necessarily to scale) of the sun, moon, and Earth in their relative positions for a solar eclipse. Then draw a sketch with the relative positions for a lunar eclipse. Throughout your life, which type of eclipse would you probably be able to see more often? Explain why. Sun Earth Moon Lunar Eclipse (Moon goes dark, passing into Earth s shadow) There s no particular reason why one type of eclipse should necessarily occur more frequently than another, although total lunar eclipses occur more frequently than total solar eclipses, because the earth casts a larger shadow than the moon does. 33. I have a bright red umbrella. What do I actually mean when I say the umbrella is red? Explain in terms of frequencies of light that are reflected or absorbed by the umbrella. A red umbrella is made of material that has a red pigment. This means that the umbrella will absorb other frequencies (green, blue) of light, and only reflect red wavelengths of light. (Note that the red umbrella can also be thought of as being composed of magenta and yellow pigments. In this analysis, magenta and yellow pigments both reflect the red frequencies, magenta absorbs green, and yellow absorbs blue, leaving only the red color reflected.) 34. What color does my red umbrella appear when it is illuminated with white light? With yellow light? With magenta light? With cyan light? The red umbrella, lit with white light, reflects only the red light, and thus appears red in color. The red umbrella lit with yellow light can be thought of as being lit by red & green light it absorbs the green light, but reflects the red, and still appears red. The red umbrella lit with magenta light can be thought of as lit by red & blue light it absorbs the blue light, but reflects the red, and thus, still appears red. Finally the red umbrella lit with cyan light is being lit by blue & green light, both of which it absorbs. The umbrella will not reflect much light at all, and appear black. 35. My raincoat is bright yellow when illuminated with white light. What color does it appear when illuminated with red light? With green light? With blue light? The yellow raincoat is composed of yellow pigment, which reflects green and red but absorbs blue light. When lit with red light, then, the yellow raincoat will appear red (there is no green in the light to be reflected). When lit with green it reflects green it appears green. When lit with blue light, there is no green or red to be reflected the blue light is absorbed, and the yellow raincoat appears black. Sun green cyan blue Moon Solar Eclipse (Sun goes dark, Moon casts shadow on Earth) Earth yellow red magenta
9 36. When a piece of green glass is held in front of a white light source, what color is the light that is transmitted through the glass? What color light is transmitted through a piece of blue glass held in front of a white light source? What color light is transmitted through the two pieces of glass (blue and green) when they are held one against the other in front of the white light source? Green glass transmits the green frequencies, and absorbs the red and blue frequencies. Blue glass allow blue frequencies to pass through, and absorbs red and green. The two pieces of glass together will absorb all frequencies, and allow no light to pass through. 37. Microwave ovens emit waves of about 2450 MHz. What is the wavelength of this radiation? Show your work!! c = λf, so λ = c f = 3.00x108 m s 2450x10 6 Hz = 0.12m 38. When red light shines on a red rose, why do the leaves become warmer than the petals? Red light shining on a red rose is almost completely reflected by the red petals. The green leaves, however, only reflect green light, so the red light is absorbed by the leaves, and the em wave energy heats up the those leaves. 39. What are the three primary colors of light? For each pair of primary colors, list the color that is produced by mixing that pair of colors of light. Then, note what color is produced by mixing all three primary colors of light in equal proportions. The primary colors of light are Red, Green, and Blue. The secondary colors come from mixing these primary colors: R+G = Yellow, G+B = Cyan, and B+R=Magenta. Mixing all three colors of light results in white light. 40. What are complementary colors? Give three examples of pairs of complementary colors, and describe what happens when light of the two colors in each pair is mixed, and also explain what happens when pigment of the two colors in each pair is mixed. Complementary colors are colors from opposite sides of the color wheel. Mixing complementary colors (of light) Red and Cyan, for example results in White light (Red, Blue, and Green are all present). Mixing complementary pigments Blue and Yellow, for example results in a Black pigment, because all wavelengths of light are absorbed by the pigments. 41. If molecules in the sky scattered low-frequency light more than high frequency light, what color would the sky appear during the majority of the day? What color would it appear at sunrise and sunset? Molecules in the sky currently scatter higher-frequency (blue) light, which allows us to see the sky as blue; during a sunset, more of the sun s green frequencies are scattered, leaving behind a sunset that is red in appearance. Under different conditions, if lower frequency light (red) were scattered, we d see the sky as red. And if lower frequencies of light are scattered more easily than higher, the red frequencies from the sun would be scattered, leaving the sun to be colored blue at sunrise and sunset. 42. You are working in a theater and have three lights available to shine on the actors on stage: red, blue, and green. If the actor is wearing a yellow jumpsuit, what color does the jumpsuit appear when you shine the red light on the actor? What color does the jumpsuit appear when you shine the blue light on the actor? What about when you shine the green light on the actor? What if you shine all three lights simultaneously on the actor? Yellow reflects red and green light, so a yellow jumpsuit lit with red light would only appear red there would be no green light to reflect off the suit. Blue light on a yellow jumpsuit would be completely absorbed (blue is the complementary to yellow), so the suit would reflect little light, and appear very dark. Green light on the yellow suit would be reflected, giving it a green color. Shining R, G, and B on the suit is the equivalent of shining white light on it light of all wavelengths which would allow the red and green light to be reflected, giving it the expected yellow color.
Waves Sound and Light r2 c:\files\courses\1710\spr12\wavetrans.doc Ron Robertson The Nature of Waves Waves are a type of energy transmission that results from a periodic disturbance (vibration). They are
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
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
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
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
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)
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
INTEGRATED SCIENCE 1: UNIT 4: PHYSICS Sub Unit 1: Waves TEST 2: Electromagnetic Waves Form A MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)Electromagnetic
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.
Wave Motion Waves are created by disturbances which cause vibrations. Vibrations produce a back-and-forth type motion called an oscillation. http://3d wave simulation The number of vibrations (or waves)
Q. The diagram below shows the range of wavelengths and frequencies for all the types of radiation in the electromagnetic spectrum. X-rays, which have frequencies in the range 0 8 0 2 Hz are already marked
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
Today: Questions re: HW Examples - Waves Wave Properties > Doppler Effect > Interference & Beats > Resonance Examples: v = λf 1. A wave is created on a Slinky such that its frequency is 2 Hz and it has
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
Ch 6: Light and Telescope Wave and Wavelength..\..\aTeach\PhET\wave-on-a-string_en.jar Wavelength, Frequency and Speed Wave and Wavelength A wave is a disturbance that moves through a medium or through
Introduction to Light, Color, and Shadows What is light made out of? -waves, photons, Electromagnetic waves (don t know this one) How do you get color? - different wavelengths of light. What does it mean
5.1.1 Oscillating Systems Waves Review Checklist 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
The maximum displacement of particles of the medium from their mean positions during the propagation of a wave Angle of an incident (arriving) ray or particle to a surface; measured from a line perpendicular
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
Exercises 26.1 The Origin of (page 515) Match each sound source with the part that vibrates. Source Vibrating Part a b d c 1. violin a. strings 2. your voice b. reed 3. saxophone c. column of air at the
Chapter 20. Traveling Waves You may not realize it, but you are surrounded by waves. The waviness of a water wave is readily apparent, from the ripples on a pond to ocean waves large enough to surf. It
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
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
Investigating electromagnetic radiation Announcements: First midterm is 7:30pm on 2/17/09 Problem solving sessions M3-5 and T3-4,5-6. Homework due at 12:50pm on Wednesday. We are covering Chapter 4 this
Sound W.S. 1. Two major classes of waves are longitudinal and transverse. Sound waves are. longitudinal transverse 2. The frequency of a sound signal refers to how frequently the vibrations occur. A high-frequency
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
Principles of Imaging Science I (RAD119) Electromagnetic Radiation Energy Definition of energy Ability to do work Physicist s definition of work Work = force x distance Force acting upon object over distance
Exercises 28.1 The Spectrum (pages 555 556) 1. Isaac Newton was the first person to do a systematic study of color. 2. Circle the letter of each statement that is true about Newton s study of color. a.
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
Chapter 25 Electromagnetic Waves Units of Chapter 25 The Production of Electromagnetic Waves The Propagation of Electromagnetic Waves The Electromagnetic Spectrum Energy and Momentum in Electromagnetic
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
Name: Light Waves and Matter Read from Lesson 2 of the Light Waves and Color chapter at The Physics Classroom: http://www.physicsclassroom.com/class/light/u12l2a.html MOP Connection: Light and Color: sublevel
Name: Class: Date: ID: A S5--AP Phys Q3 SHO-Sound PRACTICE Multiple Choice Identify the choice that best completes the statement or answers the question.. If you are on a train, how will the pitch of the
Chapter 17: Change of Phase Conceptual Physics, 10e (Hewitt) 3) Evaporation is a cooling process and condensation is A) a warming process. B) a cooling process also. C) neither a warming nor cooling process.
Semester 2 Final Exam Review Motion and Force Vocab Motion object changes position relative to a reference point. Speed distance traveled in a period of time. Velocity speed in a direction. Acceleration
LA502 Special Studies Remote Sensing Electromagnetic Radiation (EMR) Dr. Ragab Khalil Department of Landscape Architecture Faculty of Environmental Design King AbdulAziz University Room 103 Overview What
Waves PART I Wave Properties Wave Anatomy PART II Wave Math Wave Behavior PART III Sound Waves Light Waves (aka Electromagnetic Waves or Radiation) 1 Sec. 14.1 Wave Properties Objectives Identify how waves
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
Adapted from State of Delaware TOE Unit MAKING SENSE OF ENERGY Electromagnetic Waves GOALS: In this Part of the unit you will Learn about electromagnetic waves, how they are grouped, and how each group
Activity 17 Electromagnetic Radiation Why? Electromagnetic radiation, which also is called light, is an amazing phenomenon. It carries energy and has characteristics of both particles and waves. We can
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
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.)
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
Exampro GCSE Physics P Waves Self Study Questions - Higher tier Name: Class: Author: Date: Time: 74 Marks: 74 Comments: Page of 27 Q. All radio waves travel at 300 000 000 m/s in air. (i) Give the equation
Lesson 19: Mechanical Waves Mechanical Waves There are two basic ways to transmit or move energy from one place to another. First, one can move an object from one location to another via kinetic energy.
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
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
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
practice wave test.. Name Use the text to make use of any equations you might need (e.g., to determine the velocity of waves in a given material) MULTIPLE CHOICE. Choose the one alternative that best completes
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
4.5 Orbits, Tides, and the Acceleration of Gravity Our goals for learning: How do gravity and energy together allow us to understand orbits? How does gravity cause tides? Why do all objects fall at the
21 The Nature of Electromagnetic Waves When we left off talking about the following circuit: I E v = c B we had recently closed the switch and the wire was creating a magnetic field which was expanding
Light (and other electromagnetic radiation) and Sound Introduction Teacher Guidelines L1-3 Light and sound can seem mysterious. It is easy to know when light and sound are present and absent but difficult
Waves and Sound Part 1 Intro Write the following questions on a blank piece of paper (don t answer yet) 1. What is the difference between a mechanical and electromagnetic wave? 2. What is the difference
6/24 Discussion of the first law. The first law appears to be contained within the second and it is. Why state it? Newton s laws are not always valid they are not valid in, say, an accelerating automobile.
II The Nature of Electromagnetic Radiation The Sun s energy has traveled across space as electromagnetic radiation, and that is the form in which it arrives on Earth. It is this radiation that determines
Waves: Recording Sound Waves and Sound Wave Interference (Teacher s Guide) OVERVIEW Students will measure a sound wave by placing the Ward s DataHub microphone near one tuning fork A440 (f=440hz). Then
Waves Overview (Text p382>) Waves What are they? Imagine dropping a stone into a still pond and watching the result. A wave is a disturbance that transfers energy from one point to another in wave fronts.
Astronomy 110 Homework #04 Assigned: 02/06/2007 Due: 02/13/2007 Name: Directions: Listed below are twenty (20) multiple-choice questions based on the material covered by the lectures this past week. Choose
CHAPTER 14 WAVE & Sound COURSE CONTENT Properties of waves Definition Types of waves Wavelength Amplitude Frequency Waves are everywhere in nature Sound waves, visible light waves, radio waves, microwaves,
Write your name here Surname Other names Edexcel GCSE Centre Number Physics/Science Unit P1: Universal Physics Thursday 8 November 2012 Morning Time: 1 hour You must have: Calculator, ruler Candidate Number
Today s Topic: The Doppler Effect Learning Goal: SWBAT explain what the Doppler Effect is and why it occurs. A person operating a wave generator finds that when she sets the function generator to 116 Hz,
Waves and Sound An Introduction to Waves and Wave Properties Wednesday, November 19, 2008 Mechanical Wave A mechanical wave is a disturbance which propagates through a medium with little or no net displacement
COLLATED QUESTIONS: ELECTROMAGNETIC RADIATION 2011(2): WAVES Doppler radar can determine the speed and direction of a moving car. Pulses of extremely high frequency radio waves are sent out in a narrow
Principles of Technology CH 12 Wave and Sound 3 Name KEY OBJECTIVES At the conclusion of this chapter you will be able to: Define the terms constructive interference, destructive interference, resonance,
11.2 THE DOPPLER EFFECT Notes III. HOW THE DOPPLER EFFECT WORKS WITH SOUND A. SOUND FREQUENCY AND PITCH The frequency of sound waves is proportional to the pitch that we hear. DEMO Tuning Forks f = higher
Year 0 Physics Waves Revision questions Higher Name: Q. The diagram shows a plane mirror used by a dentist to see the back of a patient s tooth. (a) Use a ruler to draw a ray of light on the diagram to
L 30 Electricity and Magnetism  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
Geomorphology G322 Introduction to Aerial Photographs I. Introduction to Air Photos A. Aerial photographs are acquired by airpcraft especially equipped with cameras and view ports. 1. Early Work... Balloon-based
Chapter 20 Lecture physics FOR SCIENTISTS AND ENGINEERS a strategic approach THIRD EDITION randall d. knight Chapter 20 Traveling Waves Chapter Goal: To learn the basic properties of traveling waves. Slide
Chapter 22 Electromagnetic Waves The Production of Electromagnetic Waves Any time an electric charge is accelerated, it will radiate electromagnetic waves. The Production of Electromagnetic Waves An electromagnetic
Beats: Interference of Sound Waves Have you ever heard a piano, band, or orchestra play more than one note at a time? (These are called chords.) Chances are that the music you heard was a series of pleasant-sounding
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?
Cutnell/Johnson Physics Classroom Response System Questions Chapter 17 The Principle of Linear Superposition and Interference Phenomena Interactive Lecture Questions 17.1.1. The graph shows two waves at
Background A wave is a disturbance that carries energy, a disturbance that transports energy from one place to another without the transfer of matter. After a wave passes through a medium, there are no
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