Modern Physics
3rd Edition
ISBN: 9781111794378
Author: Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: Cengage Learning
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Chapter 3, Problem 13P
To determine
The work function for the material.
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Sunlight whose visible wavelengths range from 380 to 750 nm, is incident on a
sodium surface. The work function for sodium is 2.28 ev. Find the maximum kinetic
energy (in joules) of the photoelectrons emitted from the surface and the range of
wavelengths that will cause photoelectrons to be emitted?
A beam of ultraviolet light (100 nm - 400 nm) is incident on a silver plate of which the work function is 4.26 eV.
b) A voltage is then applied to the plate. Determine the voltage required for stopping the photoelectrons produced by the light with wavelength longer than 200 nm from leaving the plate surface. (answer: -1.94V)
When ultraviolet light with a wavelength of 254 nm falls on a clean copper surface, the stopping potential necessary to stop emission of photoelectrons is 0.181 V. (a) What is the photoelectric threshold wavelength for this copper surface? (b) What is the work function for this surface, and how does your calculated value compare with that given in Table
Chapter 3 Solutions
Modern Physics
Ch. 3.2 - Calculate the quantum number, n, for this pendulum...Ch. 3.2 - An object of mass m on a spring of stiffness k...Ch. 3 - Prob. 1QCh. 3 - Prob. 2QCh. 3 - Prob. 3QCh. 3 - Prob. 4QCh. 3 - Prob. 5QCh. 3 - Prob. 6QCh. 3 - Prob. 7QCh. 3 - Prob. 8Q
Ch. 3 - Prob. 9QCh. 3 - Prob. 10QCh. 3 - Prob. 11QCh. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 19PCh. 3 - Prob. 20PCh. 3 - Prob. 21PCh. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Prob. 31PCh. 3 - Prob. 32PCh. 3 - Prob. 33PCh. 3 - Prob. 34PCh. 3 - Prob. 35PCh. 3 - Prob. 36PCh. 3 - Prob. 37PCh. 3 - As a single crystal is rotated in an x-ray...Ch. 3 - Prob. 39PCh. 3 - Prob. 40PCh. 3 - Prob. 41PCh. 3 - Prob. 42PCh. 3 - Prob. 43PCh. 3 - Prob. 44PCh. 3 - Prob. 46PCh. 3 - Prob. 47PCh. 3 - Prob. 48P
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- If the work function of a metal is 3.2 eV, what is the maximum wavelength that a photon can have to eject a photoelectron from this metal surface?arrow_forwardWhat is the maximum kinetic energy of photoelectrons ejected from sodium by the incident radiation of wavelength 450 nm?arrow_forwardThe work function of a photoelectric surface is 2.00 eV. What is the maximum speed of the photoelectrons emitted from this surface when a 450-nm light falls on it?arrow_forward
- What is the wavelength of (a) a 12-keV X-ray photon; (b) a 2.O-MeV y -ray photon?arrow_forwardMolybdenum has a work function of 4.20 eV. Find the cutoff wavelength for the photoelectric effect.arrow_forwardWhen ultraviolet light with a wavelength of 420 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.1 eV. (a) What is the stopping potential for these photoelectrons with this Kmax? (b) What is the threshold frequency for this metal? (c) What is the maximum kinetic energy of photoelectrons when light of wavelength 314 nm falls on the same surface?arrow_forward
- Radiation with a frequency of 7.52 × 1014 Hz illuminates a photoelectric surface in a photoelectric cell. If the work function of this surface is 2.20 eV, what stopping voltage would be required to reduce the current through this cell to zero?arrow_forwardA beam of ultraviolet light (100 nm - 400 nm) is incident on a silver plate of which the work function is 4.26 eV. a) Determine the shortest de Broglie wavelength of the photoelectrons emitted from the plate surface? （answer: 4.299x10^-10m) b) A voltage is then applied to the plate. Determine the voltage required for stopping the photoelectrons produced by the light with wavelength longer than 200 nm from leaving the plate surface. (answer: -1.94V)arrow_forwardThe work function for aluminum is 4.08 eV. Ultraviolet light of wavelength 156 nm is incident on the clean surface of an aluminum sample.(a). What is the maximum kinetic energy of the ejected photoelectrons?(b). What stopping voltage would be required to arrest the current of photoelectrons?(c). Calculate the cut off frequency of aluminum.arrow_forward
- Molybdenum has a work function of 4.20 eV. Find the cutoff frequency for the photoelectric effect.arrow_forwardA metal has a work function of 4.14 eV. (a). Find the cutoff frequency for the photoelectric effect. (b.) What is the stopping potential if the incident light has a wavelength of 185 nm?arrow_forwardThe work function for indium is 4.12 eV. (d) If light of energy 7.14 eV is incident on indium, what is the maximum kinetic energy of the ejected photoelectrons? Give the answer in electron volts. eV (e) For photons of energy 7.14 eV, what stopping potential would be required to arrest the current of photoelectron? Varrow_forward
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