COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 4QAP
To determine
Why the incoming photons all have the same energy, but the emitted electrons have a range of kinetic energies if we consider the photoelectric emission of electrons induced by incident light of a single wavelength?
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1. X-ray photons of wavelength 0.02480 nm are incident on a target and the Compton-
scattered photons are observed at 90.0 •. (a) What is the wavelength (in nm) of the
scattered photons? (b) What is the momentum of the incident photons? Of the
scattered photons? (c) What is the kinetic energy of the scattered electrons? (d) What
is the momentum (magnitude and direction) of the scattered electrons?
A light source of wavelength λ illuminates a metal and ejects photoelectrons with a maximum kinetic energyof 1.00 eV. A second light source with half the wavelength of the first ejects photoelectrons with a maximumkinetic energy of 4.00 eV.• Determine the work function of the metal
4) The minimum frequency for the photoelectric effect to occur in a given metal is 5 x
10¹4 Hz.
a) Determine the metal's work function.
b) If light of frequency 7.5 x 10¹4 Hz is shined on the metal, determine the speed of the
most active electron released.
Chapter 26 Solutions
COLLEGE PHYSICS
Ch. 26 - Prob. 1QAPCh. 26 - Prob. 2QAPCh. 26 - Prob. 3QAPCh. 26 - Prob. 4QAPCh. 26 - Prob. 5QAPCh. 26 - Prob. 6QAPCh. 26 - Prob. 7QAPCh. 26 - Prob. 8QAPCh. 26 - Prob. 9QAPCh. 26 - Prob. 10QAP
Ch. 26 - Prob. 11QAPCh. 26 - Prob. 12QAPCh. 26 - Prob. 13QAPCh. 26 - Prob. 14QAPCh. 26 - Prob. 15QAPCh. 26 - Prob. 16QAPCh. 26 - Prob. 17QAPCh. 26 - Prob. 18QAPCh. 26 - Prob. 19QAPCh. 26 - Prob. 20QAPCh. 26 - Prob. 21QAPCh. 26 - Prob. 22QAPCh. 26 - Prob. 23QAPCh. 26 - Prob. 24QAPCh. 26 - Prob. 25QAPCh. 26 - Prob. 26QAPCh. 26 - Prob. 27QAPCh. 26 - Prob. 28QAPCh. 26 - Prob. 29QAPCh. 26 - Prob. 30QAPCh. 26 - Prob. 31QAPCh. 26 - Prob. 32QAPCh. 26 - Prob. 33QAPCh. 26 - Prob. 34QAPCh. 26 - Prob. 35QAPCh. 26 - Prob. 36QAPCh. 26 - Prob. 37QAPCh. 26 - Prob. 38QAPCh. 26 - Prob. 39QAPCh. 26 - Prob. 40QAPCh. 26 - Prob. 41QAPCh. 26 - Prob. 42QAPCh. 26 - Prob. 43QAPCh. 26 - Prob. 44QAPCh. 26 - Prob. 45QAPCh. 26 - Prob. 46QAPCh. 26 - Prob. 47QAPCh. 26 - Prob. 48QAPCh. 26 - Prob. 49QAPCh. 26 - Prob. 50QAPCh. 26 - Prob. 51QAPCh. 26 - Prob. 52QAPCh. 26 - Prob. 53QAPCh. 26 - Prob. 54QAPCh. 26 - Prob. 55QAPCh. 26 - Prob. 56QAPCh. 26 - Prob. 57QAPCh. 26 - Prob. 58QAPCh. 26 - Prob. 59QAPCh. 26 - Prob. 60QAPCh. 26 - Prob. 61QAPCh. 26 - Prob. 62QAPCh. 26 - Prob. 63QAPCh. 26 - Prob. 64QAPCh. 26 - Prob. 65QAPCh. 26 - Prob. 66QAPCh. 26 - Prob. 67QAPCh. 26 - Prob. 68QAPCh. 26 - Prob. 69QAPCh. 26 - Prob. 70QAPCh. 26 - Prob. 71QAPCh. 26 - Prob. 72QAPCh. 26 - Prob. 73QAPCh. 26 - Prob. 74QAPCh. 26 - Prob. 75QAPCh. 26 - Prob. 76QAPCh. 26 - Prob. 77QAPCh. 26 - Prob. 78QAPCh. 26 - Prob. 79QAPCh. 26 - Prob. 80QAPCh. 26 - Prob. 81QAPCh. 26 - Prob. 82QAPCh. 26 - Prob. 83QAPCh. 26 - Prob. 84QAPCh. 26 - Prob. 85QAPCh. 26 - Prob. 86QAPCh. 26 - Prob. 87QAPCh. 26 - Prob. 88QAPCh. 26 - Prob. 89QAPCh. 26 - Prob. 90QAPCh. 26 - Prob. 91QAPCh. 26 - Prob. 92QAPCh. 26 - Prob. 93QAPCh. 26 - Prob. 94QAPCh. 26 - Prob. 95QAPCh. 26 - Prob. 96QAPCh. 26 - Prob. 97QAPCh. 26 - Prob. 98QAPCh. 26 - Prob. 99QAPCh. 26 - Prob. 100QAPCh. 26 - Prob. 101QAPCh. 26 - Prob. 102QAPCh. 26 - Prob. 103QAPCh. 26 - Prob. 104QAP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- (a) If the power output of a 650-kHz radio station is 50.0 kW, how many photons per second are produced? (b) If the radio waves are broadcast uniformly in all directions, find the number of photons per second per square meter at a distance of 100 km. Assume no reflection from the ground or absorption by the air.arrow_forwardd) In a photoelectric experiment using a photocell, the graph of stopping potential Vs against frequency f of incident light as shown in FIGURE 6 is obtained. From the graph, deduce (i) the threshold frequency. (ii) the value of maximum kinetic energy when incident light frequency is 5.0✕1014 Hz. (Given: h=6.63✕10-34 Js ; e=1.602✕10-19 C) (iii) Determine the value of stopping potential Vs. (Given: h=6.63✕10-34 Js ; e=1.602✕10-19 C)arrow_forwardh = 6.63 x 10-34 J • s; c = 3.00 × 108 m/s; me = 9.11 × 10-³1 kg My potassium surface is illuminated by a monochromate leser light with a wavelength of 400 nm Determine the maximum speed of a photoelectron emitted from this surface if the -31 potassium surface has a work function of 2.30 ev. m 8.11 x 40 kg 2. A photon has a frequency of 7.50 x 10¹4 Hz, a. Determine the energy and the momentum of this photon. b. If all the energy of this photon were to be converted to mass, determine the equivalent mass for the particle. c. A microscopic specimen has a wavelength of 8.2 × 10-¹4m and a speed of 1.1 x 105 m/s. Determine the mass of this microscopic specimen.arrow_forward
- 3) A 2.0 mW green laser (A= 532 nm) shines on a cesium photocathode (b=1.95 eV). Assume an efficiency of 10-5 for producing photoelectrons (that is, one photoelectron produced for every 105 incident photons) and determine the photoelectric current. Answer 4) Calculate the maximum AA/1 of Compton scattering for blue light (A=480 nm, Ac=2.426 pm). Could this be easily observed? Answerarrow_forward2) Consider the photoelectric effect in zinc. The work function of the Zn is 4.30 eV. After the surface of the specimen is illuminated by light photoelectrons may or may not be emitted. a) What is the largest wavelength that will cause emission of photoelectrons? b) If light of wavelength 220 nm is used, what is the stopping potential?arrow_forwardA) Astronomers measure the peak wavelength of a nearby star to be 410 nm. What is the star's temperature? B) How much energy does a single photon of light have at this wavelength? C) An electron bound in an unknown metal requires 1.45E-19 ] of energy under the photoelectric effect to become free of the metal. How much kinetic energy would it have if struck by the photon froft part (b)? D) What is the final speed of the elctron from part (c)?arrow_forward
- a) Draw a graph that shows the relationship between the frequency of the incident radiation and the maximum kinetic energy of the electrons emitted from the photoelectric surface. Energy as a function of frequency: F7 3.50- 3.00 250 2.a- 1.50 1.00 0.50 - 1.0 20 3.0 4.O 5.0 60 7.0 Frequency (xl04“ te) b) Using your graph, determine the threshold frequency and Planck's Constant. 17 Planck's Consrant Slope erise E %3D run Energy (x10-193)arrow_forwardQuestion 2) In the photoelectric experiment, green light, with a wavelength of 522 nm, is the longest wavelength radiation that can cause the photoemission of electrons from a clean sodium surface. a) What is the work function of sodium, in electron volts, b) If UV radiation of wavelength 250 nm is incident to the sodium surface, what will be the kinetic energy of the photoemitted electrons, in electron volts.arrow_forward4-49. Incident photons strike a sodium surface having a work function of 2.2 eV, causing photoelectric emission. When a stopping potential Vo = 5.0 V is imposed, there is no photocurrent. What is the wavelength of the incident photons?arrow_forward
- Gaseous calcium atoms absorb light at 423, 272, and 240 nm. After a photon of 272 nm is absorbed from the ground state, a photon of wavelength 672 nm is emitted. After absorption of a photon of 240 nm occurs from the ground state, a photon is emitted of wavelength 504 nm. After the 504 nm photoemission occurs, what wavelength of light (in nm) would have to be emitted for an electron to return to the ground state? Construct an energy diagram to help.arrow_forwardFind the energy of the following. Express your answers in units of electron volts, noting thet 1 eV = 1.60 x 10 19 J. (a) a photon having a frequency of 7.40 x 10 Hz 3066.375 • V ev (b) a photon having a wavelength of 8.60 x 10 nm 3.56E-12 Calculate the frequency of light carresponding to the given wavelength and from the frequency calculate the energy of a photon with that wavelength. eV Need Help? Read It Master Itarrow_forwardA 0.895-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. (a) Find the momentum of the electron. kg • m/s (b) Find the kinetic energy of the electron. eVarrow_forward
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