Modern Physics
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 15P

(a)

To determine

The cutoff wavelength and the threshold frequency.

(b)

To determine

The stopping potential.

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The 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.
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
A 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?
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