University Physics with Modern Physics (14th Edition)
University Physics with Modern Physics (14th Edition)
14th Edition
ISBN: 9780321973610
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 38, Problem 38.38P

(a)

To determine

From Table 18.1 which materials will produce photoelectrons for the given ultraviolet light.

(b)

To determine

The greatest kinetic energy of photoelectrons and maximum speed of photoelectrons.

(c)

To determine

The longest wavelength which produces photoelectron from gold surface.

(d)

To determine

The maximum kinetic energy of photoelectrons produced from sodium surface.

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In a photoelectric experiment visible/white light (λ = 400 to 700nm) falls on a metal with work function of? = 2.48eV. a)  What is the range of wavelengths (λmin, λmax) of visible light that ejects electrons from the metal? b)  What is the maximum speed of photoelectrons? c)  What is the stopping potential? d)  If a 15 mW laser of λ = 450 nm is used, how many photons are emitted each second?
You illuminate a metal with light of wavelength 640 nm and find that the photoelectrons have a maximum kinetic energy of 0.70 eV. You then illuminate the same metal with light of another wavelength and find a maximum kinetic energy of 2.5 eV for the photoelectrons. What is the second wavelength, in nanometers?
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Chapter 38 Solutions

University Physics with Modern Physics (14th Edition)

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