2. 빈공간 (empty space) 에서질량이 0 인 real photon이 pair production을할수없음을보이시오. photoelectron current 와 retarding potential 의관계를그래프를이용해설명하시오.


 Opal Baker
 2 years ago
 Views:
Transcription
1 현대물리학 ( 김충선교수님 ) 2 차시험 월요일 1. A photon whose energy equals the rest mass of the electron undergoes a Compton collision with an electron at rest. If the electron moves off at an angle of 60 with the original photon direction, what is the energy of the scattered photon? ( 3=1.8) 2. 빈공간 (empty space) 에서질량이 0 인 real photon이 pair production을할수없음을보이시오. 3. 아래는광전효과를보기위한실험장비입니다. 실험장비에서 metal surface는 Cesium입니다. (a) 빛의주파수를일정하게하였을때 (ν`=const; hν`=3.0 ev), 빛의세기에따른 (I, 2I, 3I) photoelectron current 와 retarding potential 의관계를그래프를이용해설명하시오. (b) 빛의세기를일정하게하였을때 (I=const), 주파수에따른 (ν 0, 2ν 0, 3ν 0 ; hν 0 =1.9 ev) photoelectron current 와 retarding potential 의관계를그래프를이용해설명하시오. (c) Metal surface가각각 Cesium, Lithium, Silver 의경우에 Maximum photoelectron energy 와 frequency 와의관계를그래프를이용해설명하시오.
2 4. 입자가길이 L 인사각형박스에가둬져있는아래와같은시스템이있다. (a) 이시스템에서입자가가질수있는 De Broglie wavelength를구하고, 왜그러한결과가생기는지설명하시오. (b) 입자가가질수있는에너지를구하시오. (c) Ground state 와 first excited state 의 wavefunction 을그리시오. 5. A particle has a de Broglie wavelength of m. The rest energy of the particle is 800 kev. (h = ev s, c = m/s) (a) Find its kinetic energy. (b) Find the group velocity of its de Broglie waves. (c) Find the phase velocity of its de Broglie waves 6. The position and momentum of a 1.00keV electron are simultaneously determined. If its position is located to within nm, what is the percentage of uncertainty in its momentum? (ħ= ev s, m e c 2 =500 kev, 10=3)
3 MODERN PHYSICS (1), 2 nd examination (Wed) (25 points for each problem, the total will be 150 points.) Prof. C.S.Kim Student ID Name 1. Xrays of wavelength 20.0pm are scattered from a target. Estimate the electron s Compton wavelength as 2pm. <Estimate h = 4.0 x ev s> ( 1 pm = m ) A. Find the wavelength of the xrays scattered through 60.(10pts) B. Find the possible maximum wavelength present in the scattered xrays.(5pts) C. Find the maximum kinetic energy of the recoil electrons.(10pts) 2. A particle with a kinetic energy of 2.0MeV collides with its antiparticle at rest and the two particles are annihilated. Two photons are produced; one moves in the same direction as the incoming particle and the other moves in the opposite direction. Find the energy of the photons. <rest mass of the particle = 3.0MeV> (Antiparticles have exact same characteristics to a particle except that the charge is opposite.) (25pts) **************For #3 and #4, set the values of the following constants as ************** <h = 5x1015 ev s, c = 3x10 8 m/s, rest energy of an electron = 500keV> 3. An electron has a de Broglie wavelength of 3.00pm. Find its kinetic energy and the phase and group velocities of its de Broglie waves. (9, 8, 8 pts each) 4. A beam of 500keV electrons is directed at a crystal and diffracted electrons are found at an angle of 120 relative to the original beam. A. Do you think relativistic calculation is needed? Show your explanation. (5pts) B. What is the minimum spacing of the atomic planes of the crystal? (20pts)
4 5. Think of a particle in a 1dimensional box of width L. A. Write down or derive the permitted energy E n and the wavelengths, and draw how the waves look like for n = 1, 2 states.(15pts) B. Calculate the ground state energy E 1 by using the uncertainty principle.(10pts) 6. Suppose that an electron lets out a photon and changes its path. < E(e1), E(e2) >> m e 0, for convenience, set c = 1 > A. Derive the masssquare, m γ (θ) 2, of the photon as a function of θ.(15pts) B. In what situation, does the mass of the photon become 0?(10pts) (i.e. Give the values of θ and Φ.)
5 The second Exam. of Modern physics (The electron mass, m e, is ev/c 2, the proton mass, m p = 10 9 ev/c 2 and c = m/s. ) 1. A very fast moving electron(e) emits an photon(γ) which is a real photon (m γ = 0) (see Figure 1). In this process, if P c >> m e c 2, what is the magnitude of θ? Figure 1: 2. The work function of a Lithium is 2.5 ev. When the surface is illuminated by light of wavelength 300 nm, the maximum photoelectron energy is 1.5 ev. Derive Planck constant from these data. Using the value of Planck constant obtained, find the maximum wavelength of light that will cause photoelectrons to be emitted from silver. (where the work function of silver is 4.7 ev.) 3. (a) Derive the compton wavelength of an electron. (See Figure 2) (b) Find the change in wavelength of 120 pm Xray that are scattered 90 by a target electron in compton scattering. (h = ev s, pm = m) (c) Find the angle, θ, between the directions of the recoil electron and the incident photon. 1
6 Figure 2: 4. (a) Show that the phase velocity of the de Broglie waves of a particle of mass m and de Broglie wavelength λ is given by ( mcλ ) 2 v p = c 1 + (1) h (b) Compare the phase and group velocities of an proton whose de Broglie wavelength is exactly m. Between these, what is the velocity corresponds to the motion of the proton? Why do you think so? Figure 3: 5. (a) Derive energy levels of a particle in a 1dimensional box (See Figure 3), where the particle is free particle and the potentials of walls are infinite as well as the velocity of the particle is sufficiently small (v << c). (b) If a proton is in a 1dimensional box with 0.5 nm across, find its permitted energies and plot its wave function of the first excited state simply. The Planck constant h = ev s. 6. The position and momentum of a 0.90keV electron are simultaneously determined. If its position is located to within m, what is the percentage of uncertainty in its momentum? ( h = ev s) 2
Answer: b. Answer: a. Answer: d
Practice Test IV Name 1) In a single slit diffraction experiment, the width of the slit is 3.1 105 m and the distance from the slit to the screen is 2.2 m. If the beam of light of wavelength 600 nm passes
More informationPractice Problems (Set #1) Properties of Electromagnetic Radiation. 1. Why don't we notice the wave nature of matter in our everyday experience?
Practice Problems (Set #1) Properties of Electromagnetic Radiation 1. Why don't we notice the wave nature of matter in our everyday experience? Since matter has huge mass, the wavelength will be very large
More informationPRACTICE EXAM IV P202 SPRING 2004
PRACTICE EXAM IV P202 SPRING 2004 1. In two separate double slit experiments, an interference pattern is observed on a screen. In the first experiment, violet light (λ = 754 nm) is used and a secondorder
More informationProblem Set 1 Solutions
Chemistry 36 Dr. Jean M. Standard Problem Set Solutions. The first 4 lines in the visible region of atomic line spectrum of hydrogen atom occur at wavelengths of 656., 486., 434.0, and 40. nm (this is
More informationPeople s Physics book
The Big Idea Quantum Mechanics, discovered early in the 20th century, completely shook the way physicists think. Quantum Mechanics is the description of how the universe works on the very small scale.
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A photo cathode whose work function is 2.4 ev, is illuminated with white light that has
More informationChapter 27 Early Quantum Physics and the Photon
Chapter 27 Early Quantum Physics and the Photon 1. A problem with the classical theory for radiation from a blackbody was that the theory predicted too much radiation in the wavelengths. A. ultraviolet
More informationChapter 35: Quantum Physics
Newton himself was better aware of the weakness inherent in his intellectual edifice than the generations which followed him. This fact has always aroused my admiration. Albert Einstein 35.1 The Particle
More informationElectron Diffraction
Electron Diffraction Do moving electrons display wave nature? To answer this question you will direct a beam of electrons through a thin layer of carbon and analyze the resulting pattern. Theory Louis
More informationQuantum Mechanics I Physics 325. Importance of Hydrogen Atom
Quantum Mechanics I Physics 35 Atomic spectra and Atom Models Importance of Hydrogen Atom Hydrogen is the simplest atom The quantum numbers used to characterize the allowed states of hydrogen can also
More informationTIME OF COMPLETION NAME SOLUTION DEPARTMENT OF NATURAL SCIENCES. PHYS 3650, Exam 2 Section 1 Version 1 October 31, 2005 Total Weight: 100 points
TIME OF COMPLETION NAME SOLUTION DEPARTMENT OF NATURAL SCIENCES PHYS 3650, Exam 2 Section 1 Version 1 October 31, 2005 Total Weight: 100 points 1. Check your examination for completeness prior to starting.
More informationPhysics 111 Homework Solutions Week #9  Tuesday
Physics 111 Homework Solutions Week #9  Tuesday Friday, February 25, 2011 Chapter 22 Questions  None MultipleChoice 223 A 224 C 225 B 226 B 227 B 229 D Problems 227 In this double slit experiment we
More informationWAVES AND PARTICLES. (v) i.e (vi) The potential difference required to bring an electron of wavelength to rest
WAVES AND PARTICLES 1. De Broglie wavelength associated with the charges particles (i) The energy of a charged particle accelerated through potential difference q = charge on the particel (ii) Momentum
More informationHW to be handed in: Extra (do not hand in):
CHEM344 HW#5 Due: Fri, Feb 28@2pm BEFORE CLASS! HW to be handed in: Atkins(9 th ed.) Chapter 7: Exercises: 7.6(b), 7.8(b), 7.10(b), 7.13(b) (moved to HW6), 7.15(b), 7.17(b), Problems: 7.2, 7.6, 7.10, 7.18,
More informationRelativity II. Selected Problems
Chapter Relativity II. Selected Problems.1 Problem.5 (In the text book) Recall that the magnetic force on a charge q moving with velocity v in a magnetic field B is equal to qv B. If a charged particle
More informationλν = c λ ν Electromagnetic spectrum classification of light based on the values of λ and ν
Quantum Theory and Atomic Structure Nuclear atom small, heavy, positive nucleus surrounded by a negative electron cloud Electronic structure arrangement of the electrons around the nucleus Classical mechanics
More information** View All Solutions Here **
QUESTIONS 1077 PART 5 Light Quanta Photons An electromagnetic wave (light) is quantized, and its quanta are called photons. For a light wave of frequency f and wavelength l, the energy E and momentum magnitude
More informationemission of light from atoms discrete line spectra  energy levels, FranckHertz experiment
Introduction Until the early 20 th century physicists used to explain the phenomena in the physical world around them using theories such a mechanics, electromagnetism, thermodynamics and statistical physics
More informationPhysics 102 Extra practice problems Fall The next two questions pertain to the following situation:
The next two questions pertain to the following situation: Three charges are placed located as shown in the figure to the right. The grid spacing is in meters.. y 10. 1. Calculate the xcomponent of the
More informationSolved Problems on Quantum Mechanics in One Dimension
Solved Problems on Quantum Mechanics in One Dimension Charles Asman, Adam Monahan and Malcolm McMillan Department of Physics and Astronomy University of British Columbia, Vancouver, British Columbia, Canada
More informationPHOTOELECTRIC EFFECT AND DUAL NATURE OF MATTER AND RADIATIONS
PHOTOELECTRIC EFFECT AND DUAL NATURE OF MATTER AND RADIATIONS 1. Photons 2. Photoelectric Effect 3. Experimental Setup to study Photoelectric Effect 4. Effect of Intensity, Frequency, Potential on P.E.
More informationAtomic Spectra and Energy Levels. Atomic Spectra
Atomic Spectra and Energy Levels Atomic Spectra Excited atoms emit light (neon signs, etc.) Emission from different elements is different colors. Emission of only certain wavelengths Spectral lines Existence
More informationChapter 3: Quantum Physics
Newton himself was better aware of the weakness inherent in his intellectual edifice than the generations which followed him. This fact has always aroused my admiration. Albert Einstein 3.1 The Particle
More informationPhysics 30 Worksheet # 14: Michelson Experiment
Physics 30 Worksheet # 14: Michelson Experiment 1. The speed of light found by a Michelson experiment was found to be 2.90 x 10 8 m/s. If the two hills were 20.0 km apart, what was the frequency of the
More informationPhys 234H Practice Final Exam (Note: this practice exam contains more questions than will the final, which will have 25 multiplechoice questions.
Phys 234H Practice Final Exam (Note: this practice exam contains more questions than will the final, which will have 25 multiplechoice questions. MULTIPLE CHOICE. Choose the one alternative that best
More informationMatter Waves. Home Work Solutions
Chapter 5 Matter Waves. Home Work s 5.1 Problem 5.10 (In the text book) An electron has a de Broglie wavelength equal to the diameter of the hydrogen atom. What is the kinetic energy of the electron? How
More informationCOLLEGE 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 reemits it in a spectrum that depends only on temperature.
More informationExperiment Note: Exploring Compton Scattering Using the Spectrum Techniques UCS20 Universal Computer Spectrometer.
Experiment Note: Exploring Compton Scattering Using the Spectrum Techniques UCS20 Universal Computer Spectrometer. Shanni R. Prutchi and David Prutchi, Ph.D. www.diyphysics.com Objective The objective
More informationAS Revision questions Quantum Phenomena and Electricity
Q1. (a) State what happens in an atom when line spectra are produced. Electrons move from one energy level (or orbit) to a higher one (1 mark) when they absorb energy from an incoming photon or interact
More informationMatter Waves. Solutions of Selected Problems
Chapter 5 Matter Waves. Solutions of Selected Problems 5. Problem 5. (In the text book) For an electron to be confined to a nucleus, its de Broglie wavelength would have to be less than 0 4 m. (a) What
More informationTopic 1. Atomic Structure and Periodic Properties
Topic 1 11 Atomic Structure and Periodic Properties Atomic Structure 12 History Rutherford s experiments Bohr model > Interpretation of hydrogen atom spectra Wave  particle duality Wave mechanics Heisenberg
More informationPractice questions for Ch. 7
Name: Class: Date: ID: A Practice questions for Ch. 7 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. When ignited, a uranium compound burns with a green
More information91.18 nm nm. λ = λ = nm. where n = 3, 4, 5, 6, and where we have used n = 6. Likewise for n = 8 and n = 10, λ = nm and.
4.1. Model: Balmer s formula predicts a series of spectral lines in the hydrogen spectrum. Solve: Substituting into the formula for the Balmer series, 91.18 nm λ = 1 1 n 91.18 nm λ = = 410.3 nm 1 1 6 where
More informationTHE ISOTOPIC SHIFT IN THE SPECTRA OF HYDROGEN AND DEUTERIUM: OBSERVATIONS USING A GRATING SPECTROSCOPE
THE ISOTOPIC SHIFT IN THE SPECTRA OF HYDROGEN AND DEUTERIUM: OBSERVATIONS USING A GRATING SPECTROSCOPE Introduction The goals of this experiment are to measure the wavelengths of the Balmer lines of hydrogen,
More informationPhysics 111 Fall 2007 Wave Optics Solutions
Physics 111 Fall 2007 Wave Optics Solutions 1. The pupil of a cat s eye narrows to a vertical slit of width 0.500 mm in daylight. What is the angular resolution for horizontally separated mice? Assume
More informationSemiconductors, Insulators and Metals
CHAPTER 2 ENERGY BANDS AND EFFECTIVE MASS Semiconductors, insulators and metals Semiconductors Insulators Metals The concept of effective mass Prof. Dr. Beşire GÖNÜL Semiconductors, Insulators and Metals
More informationPhysics 116. Nov 28, Session 35 Review of Chapters R. J. Wilkes
Physics 116 Session 35 Review of Chapters 2830 Nov 28, 2011 R. J. Wilkes Email: ph116@u.washington.edu Announcements Exam 3 tomorrow: Material covered in class from Chapters 28, 29, 30 Usual exam rules
More informationANSWERS. 2K m. = 2mK = 2meV since K = ev. h 2meV 19 C V
ANSWERS 95 CHAPTER AN. The de Broglie wavelength is given by h λ. mv The rest energy of an electron is about 0.5 MeV and the electrons here have kinetic energies of 5 kev, so the nonrelativistic approximation
More informationDiagnostic Xrays and CT Scans  Xray vision
 Xray vision http://www.uab.edu/surgonc/cases/gi/case2/ctscanof.htm http://www.museumboerhaave.nl/aacollection/aajpegs/m22/9955.jpg  motivation and outline Xrays have been known for over 110 years.
More informationThe Electronic Structures of Atoms Electromagnetic Radiation
The Electronic Structures of Atoms Electromagnetic Radiation The wavelength of electromagnetic radiation has the symbol λ. Wavelength is the distance from the top (crest) of one wave to the top of the
More informationRules for this test. Physics 222, Winter 2012 Final Exam April 16, 2012 Instructor: Scott Bergeson
Physics 222, Winter 2012 Final Exam April 16, 2012 Instructor: Scott Bergeson Rules for this test 1. This test is open book and open notes, including our class notes page online, and your homework solutions.
More informationPHY4604 Introduction to Quantum Mechanics Fall 2004 Practice Exam Solutions Dec. 13, 2004
PHY4604 Introduction to Quantum Mechanics Fall 2004 Practice Exam Solutions Dec. 1, 2004 No materials allowed. If you can t remember a formula, ask and I might help. If you can t do one part of a problem,
More informationXRAY AND GAMMA RAY SPECTRA
Experiment N3 XRAY AND GAMMA RAY SPECTRA References: Handbook of Chemistry and Physics Nuclear Level Schemes, A=45 Through A=257, QC795.8.E5.N8 Background: As in case of atomic physics, much of what we
More informationDoes Quantum Mechanics Make Sense? Size
Does Quantum Mechanics Make Sense? Some relatively simple concepts show why the answer is yes. Size Classical Mechanics Quantum Mechanics Relative Absolute What does relative vs. absolute size mean? Why
More informationChapter 9. Gamma Decay
Chapter 9 Gamma Decay As we have seen γdecay is often observed in conjunction with α or βdecay when the daughter nucleus is formed in an excited state and then makes one or more transitions to its ground
More informationAP Chemistry A. Allan Chapter 7 Notes  Atomic Structure and Periodicity
AP Chemistry A. Allan Chapter 7 Notes  Atomic Structure and Periodicity 7.1 Electromagnetic Radiation A. Types of EM Radiation (wavelengths in meters) 101 1010 108 4 to 7x107 104 101 10 10 4 gamma
More informationAtomic Structure: Chapter Problems
Atomic Structure: Chapter Problems Bohr Model Class Work 1. Describe the nuclear model of the atom. 2. Explain the problems with the nuclear model of the atom. 3. According to Niels Bohr, what does n stand
More informationChapter 18: The Structure of the Atom
Chapter 18: The Structure of the Atom 1. For most elements, an atom has A. no neutrons in the nucleus. B. more protons than electrons. C. less neutrons than electrons. D. just as many electrons as protons.
More informationPhysics 2140: Hour Exam 3 Friday, July 6, 2007
Physics 140: Hour Exam 3 Friday, July 6, 007 Each Question is worth 10 oints Circle 13 of the following 14 roblems. I will only grade the circled roblems! Please show your work in solving the the roblems
More informationhypothesis of Louis de Broglie (1924): particles may have wavelike properties
Wave properties of particles hypothesis of Louis de Broglie (1924): particles may have wavelike properties note: it took almost 20 years after noting that waves have particle like properties that particles
More informationPhotons. ConcepTest 27.1. 1) red light 2) yellow light 3) green light 4) blue light 5) all have the same energy. Which has more energy, a photon of:
ConcepTest 27.1 Photons Which has more energy, a photon of: 1) red light 2) yellow light 3) green light 4) blue light 5) all have the same energy 400 nm 500 nm 600 nm 700 nm ConcepTest 27.1 Photons Which
More informationExam 2 Solutions Chem 6, 9 Section, Spring 2002
1. Dartmouth s FM radio station, WDCR, broadcasts by emitting from its antenna photons of frequency 99.3 MHz (99.3 10 6 Hz). (a) What is the energy of a single WDCR photon? The photon energy is simply
More informationATTENUATION OF GAMMA RAYS
Vilnius University Faculty of Physics Department of Solid State Electronics Laboratory of Atomic and Nuclear Physics Experiment No. 10 ATTENUATION OF GAMMA RAYS by Andrius Poškus (email: andrius.poskus@ff.vu.lt)
More informationIntroduction to the physics of highquality electron beams
Introduction to the physics of highquality electron beams ' Chase Boulware Photo Injector Test facility, Zeuthen (PITZ) Chase Boulware, PITZ physics lecture for summer students, August 16, 2007 1 The
More informationHeisenberg Uncertainty
Heisenberg Uncertainty Outline  Heisenberg Microscope  Measurement Uncertainty  Example: Hydrogen Atom  Example: Single Slit Diffraction  Example: Quantum Dots 1 TRUE / FALSE A photon (quantum of
More informationChapter 2. Second Edition ( 2001 McGrawHill) 2.1 Electrical conduction. Solution
Chapter 2 Second Edition ( 200 McGrawHill) 2. Electrical conduction Na is a monovalent metal (BCC) with a density of 0.972 g cm 3. Its atomic mass is 22.99 g mol . The drift mobility of electrons in
More informationAn Introduction to Quantum Cryptography
An Introduction to Quantum Cryptography J Robert Buchanan Millersville University of Pennsylvania email: Bob.Buchanan@millersville.edu An Introduction to Quantum Cryptography p.1 Acknowledgments Quantum
More informationIntermediate Quantum Mechanics Notes for Lecture 1
The Structure of Physics Intermediate Quantum Mechanics Notes for Lecture 1 Structure of Physics, Classical Physics and Quantum Mechanics vs. Classical Physics The two pillars of physics are the Special
More informationInteractions of Photons with Matter
Interactions of Photons with Matter Photons are elecomagnetic radiation with zero mass, zero charge, and a velocity that is always c, the speed of light. Because they are elecically neual, they do not
More informationQuantum Physics. When we consider the motion of objects on the atomic level, we find that our classical approach does not work very well.
Quantum Physics When we consider the motion of objects on the atomic level, we find that our classical approach does not work very well. For example, quantum physics describes how electrons surround the
More informationCharacteristic XRadiation of Tungsten
Characteristic XRadiation TEP Related Topics Xray tube, bremsstrahlung, characteristic radiation, energy levels, crystal structures, lattice constant, absorption, absorption edges, interference, the
More informationPhysics 25 Exam 4 December 1, 2009 Dr. Alward
1. Two slits are separated by 2.00 10 5 m. They are illuminated by light of wavelength 5.60 10 7 m. If the distance from the slits to the screen is 6.00 m, what is the separation between the central bright
More informationThomson and Rayleigh Scattering
Thomson and Rayleigh Scattering Initial questions: What produces the shapes of emission and absorption lines? What information can we get from them regarding the environment or other conditions? In this
More informationExam 3S12PHYS April 2012
ame: Exam 3S12PHYS102 30 April 2012 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of the following statements is true? a. Newton believed light
More informationnot to be republished NCERT DUAL NATURE OF RADIATION AND MATTER Chapter Eleven Physics 11.1 INTRODUCTION
386 Physics Chapter Eleven DUAL NATURE OF RADIATION AND MATTER 11.1 INTRODUCTION The Maxwell s equations of electromagnetism and Hertz experiments on the generation and detection of electromagnetic waves
More informationVersion 001 Relativity tubman (111213) 1
Version 00 Relativity tubman (23) This printout should have 36 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. AP B 993 MC 40 00 0.0 points
More informationFrom Einstein to KleinGordon Quantum Mechanics and Relativity
From Einstein to KleinGordon Quantum Mechanics and Relativity Aline Ribeiro Department of Mathematics University of Toronto March 24, 2002 Abstract We study the development from Einstein s relativistic
More informationNanoelectronics. Chapter 2 Classical Particles, Classical Waves, and Quantum Particles. Q.Li@Physics.WHU@2015.3
Nanoelectronics Chapter 2 Classical Particles, Classical Waves, and Quantum Particles Q.Li@Physics.WHU@2015.3 1 Electron DoubleSlit Experiment Q.Li@Physics.WHU@2015.3 2 2.1 Comparison of Classical and
More informationCalculating particle properties of a wave
Calculating particle properties of a wave A light wave consists of particles (photons): The energy E of the particle is calculated from the frequency f of the wave via Planck: E = h f (1) A particle can
More informationNo Brain Too Small PHYSICS ATOMS: PHOTONS AND THE PHOTOELECTRIC EFFECT QUESTIONS
ATOMS: PHOTONS AND THE PHOTOELECTRIC EFFECT QUESTIONS SODIUM LAMPS (2012;2) Low pressure sodium lamps are widely used in street lighting. The lamps produce light when an electric current is passed through
More informationAP Physics B Free Response Solutions
AP Physics B Free Response Solutions. (0 points) A sailboat at rest on a calm lake has its anchor dropped a distance of 4.0 m below the surface of the water. The anchor is suspended by a rope of negligible
More informationHomework #8 20311721 Physics 2 for Students of Mechanical Engineering. Part A
Homework #8 20311721 Physics 2 for Students of Mechanical Engineering Part A 1. Four particles follow the paths shown in Fig. 3233 below as they pass through the magnetic field there. What can one conclude
More informationPHYSICAL QUANTITIES AND UNITS
1 PHYSICAL QUANTITIES AND UNITS Introduction Physics is the study of matter, its motion and the interaction between matter. Physics involves analysis of physical quantities, the interaction between them
More informationArthur Beiser Concepts of Modern Physics, 6.
2.., Arthur Beiser Concepts of Modern Physics, 6. :, :,, (, ) 69 ,, 2.1 ( c = 1 ) 2.998 10 8 m/s ɛ0 µ 0 2.2 כ 2.3(a) 2.3(b) Young כ 2.4 :. ( ). ( ) : ( ) * 2.5 2.6 ( ) ν ν + dν (3 ) 2.7 G(ν)dν = 8πν2 c
More informationNuclear Fusion and Radiation
Nuclear Fusion and Radiation Lecture 2 (Meetings 3 & 4) Eugenio Schuster schuster@lehigh.edu Mechanical Engineering and Mechanics Lehigh University Nuclear Fusion and Radiation p. 1/40 Modern Physics Concepts
More informationSolutions to Problems in Goldstein, Classical Mechanics, Second Edition. Chapter 7
Solutions to Problems in Goldstein, Classical Mechanics, Second Edition Homer Reid April 21, 2002 Chapter 7 Problem 7.2 Obtain the Lorentz transformation in which the velocity is at an infinitesimal angle
More informationElectromagnetic radiation (Maxwell, 1864) (nature of light) Composed of perpendicular electric field and magnetic field
7 Atomic Structure and Periodicity Electromagnetic radiation (Maxwell, 1864) (nature of light) Composed of perpendicular electric field and magnetic field Electric field (E) (wavelength) t Magnetic field
More informationBOHR S THEORY AND PHYSICS OF ATOM CHAPTER 43
1. a BOHR S THEORY AND PHYSICS OF ATOM CHAPTER 3 1 h A T (ML T ) M L T 3 L me L MLT M(AT) M L T a has dimensions of length.. We know, 1/ 1.1 1 (1/n 1 1/n ) a) n 1, n 3 or, 1/ 1.1 1 (1/ 1/9) 36 or, 6.5
More informationMODERN PHYSICS. CET questions from Bohr s atom model, Lasers and Scattering
MODERN PHYSICS CET questions from Bohr s atom model, Lasers and Scattering 1. For the electron to revolve around the atomic nucleus without radiating energy, the electronic orbit should be : (1) Circular
More informationSAT Subject Physics Formula Reference
This guide is a compilation of about fifty of the most important physics formulas to know for the SAT Subject test in physics. (Note that formulas are not given on the test.) Each formula row contains
More informationQuantum, Atomic and Nuclear Physics
Quantum, Atomic and Nuclear Physics Regular Quantum, Atomic and Nuclear Physics Worksheets and Solutions QR1: Photons 3 QR2: Wave Functions I Particles as Waves 7 QR3: Wave Functions II Particles in Boxes
More informationDIFFRACTION OF LIGHT
Laboratory Exercise 4. DIFFRACTION OF LIGHT Diffraction Gratings. Determining the Wavelength of Laser Light Using a Diffraction Grating. Refraction. Observation of Atomic Spectra. Theoretical background:
More informationDO PHYSICS ONLINE FROM QUANTA TO QUARKS QUANTUM (WAVE) MECHANICS
DO PHYSICS ONLINE FROM QUANTA TO QUARKS QUANTUM (WAVE) MECHANICS Quantum Mechanics or wave mechanics is the best mathematical theory used today to describe and predict the behaviour of particles and waves.
More informationThe structure of atoms
The structure of atoms Atomic models The Rutherford experiment Bohr's theory of the hidrogen atom The FrankHertz experiment Atomic models arly ideas One of the most intriguing questions, to which already
More informationPY 407 HW #2 (Sp09) (778061)
1/22/09 1:08 PM PY 407 HW #2 (Sp09) (778061) Fri Jan 23 2009 10:00 PM EST 1 2 3 4 5 6 7 1. Details TR3 2.P.06. [427711] In the 1887 experiment by Michelson and Morley, the length of each arm was 11 m.
More informationChapter 11 Atoms, Energy and Electron Configurations Objectives
Objectives 1. To review Rutherford s model of the atom 2. To explore the nature of electromagnetic radiation 3. To see how atoms emit light A. Rutherford s Atom.but there is a problem here!! Using Rutherford
More informationThe Bohr atom and the Uncertainty Principle
The Bohr atom and the Uncertainty Principle Previous Lecture: Matter waves and De Broglie wavelength The Bohr atom This Lecture: More on the Bohr Atom The H atom emission and absorption spectra Uncertainty
More informationFinal Exam, Chem 311, 120 minutes, Dr. H. Guo, Dec. 17, You are allowed to bring a two page sheet containing equations and a calculator
Final Exam, Chem 311, 120 minutes, Dr. H. Guo, Dec. 17, 2008 You are allowed to bring a two page sheet containing equations and a calculator I. Answer the following multiple choice questions (5 pts each),
More informationGamma Rays OBJECT: READINGS: APPARATUS: BACKGROUND:
Gamma Rays OBJECT: To understand the various interactions of gamma rays with matter. To calibrate a gamma ray scintillation spectrometer, using gamma rays of known energy, and use it to measure the energy
More informationWhat can we learn about stars from their spectra? T=10,000 K T=8000 K T=5800 K T=3000 K
What can we learn about stars from their spectra? T=10,000 K T=8000 K T=5800 K T=3000 K What can we learn about stars from their spectra? Observed Spectra of Vegatype Star Solartype Star T=10,000 K T=8000
More informationPhotoelectric Effect
Photoelectric Effect 1 Introduction In science, we reject or modify old ideas, to explain new observations. Sometimes we try to disprove an idea, but end up with supporting it never before. The historical
More informationnot to be republished NCERT NUCLEI Chapter Thirteen MCQ I
Chapter Thirteen NUCLEI MCQ I 131 Suppose we consider a large number of containers each containing initially 10000 atoms of a radioactive material with a half life of 1 year After 1 year, (a) all the containers
More informationThe Early History of Quantum Mechanics
Chapter 2 The Early History of Quantum Mechanics In the early years of the twentieth century, Max Planck, Albert Einstein, Louis de Broglie, Neils Bohr, Werner Heisenberg, Erwin Schrödinger, Max Born,
More informationACCELERATORS AND MEDICAL PHYSICS 2
ACCELERATORS AND MEDICAL PHYSICS 2 Ugo Amaldi University of Milano Bicocca and TERA Foundation EPFL 228.10.10  U. Amaldi 1 The icone of radiation therapy Radiation beam in matter EPFL 228.10.10  U.
More informationTHE NATURE OF THE ATOM
CHAPTER 30 THE NATURE OF THE ATOM CONCEPTUAL QUESTIONS 1. REASONING AND SOLUTION A tube is filled with atomic hydrogen at room temperature. Electromagnetic radiation with a continuous spectrum of wavelengths,
More informationThomson and Rayleigh Scattering
Thomson and Rayleigh Scattering In this and the next several lectures, we re going to explore in more detail some specific radiative processes. The simplest, and the first we ll do, involves scattering.
More informationLetter STUDENT NUMBER. PHYSICS Written examination. Number of questions and mark allocations may vary from the information indicated.
Victorian Certificate of Education SUPERVISOR TO ATTACH PROCESSING LABEL HERE Letter STUDENT NUMBER Section PHYSICS Written examination Wednesday November Reading time:. pm to. pm ( minutes) Writing time:.
More informationIntroduction: what is quantum field theory?
Introduction: what is quantum field theory? Asaf Pe er 1 January 13, 2015 This part of the course is based on Ref. [1] 1. Relativistic quantum mechanics By the mid 1920 s, the basics of quantum mechanics
More informationElectromagnetic Radiation Wave and Particle Models of Light
Electromagnetic Radiation 2007 26 minutes Teacher Notes: Victoria Millar BSc (Hons), Dip. Ed, MSc Program Synopsis For hundreds of years, scientists have hypothesised about the structure of light. Two
More informationThe Photoelectric Effect
The Photoelectric Effect This topic is so important, it deserves its own note set. In 1887, Heinrich Hertz discovered that certain metals emit electrons when light is incident on them. This was the first
More information