Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 39, Problem 45AP
(a)
To determine
The maximum rate of photoelectron emission from
(b)
To determine
The
(c)
To determine
The comparison between the actual current and maximum possible current.
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The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E <
hf – W, where h is Planck's constant, f is the frequency of the light, and W is the work-function.
Silver has a work function that varies with the state of the surface. A piece of silver is illuminated
by a mercury lamp giving monochromatic UVC light at 253.7 nm wavelength. Photoelectrons
are detected for applied stopping potentials up to 626.5 mV, above which no photoelectrons are
observed.
a) Calculate the work-function of the silver.
b)
Calculate the maximum speed of the emitted photoelectrons when no stopping potential is
applied.
The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E <
hf – W, where h is Planck's constant, f is the frequency of the light, and W is the work-function.
Silver has a work function that varies with the state of the surface. A piece of silver is illuminated
by a mercury lamp giving monochromatic UVC light at 253.7 nm wavelength. Photoelectrons
are detected for applied stopping potentials up to 626.5 mV, above which no photoelectrons are
observed.
а)
Calculate the work-function of the silver.
b) Calculate the maximum speed of the emitted photoelectrons when no stopping potential is
applied.
The photoelectric work function for a
surface is 2.4 eV. Light of wavelength 6800 A
shines on the given surface. Find the incident
ánd threshold frequencies. Will there be
photoelectric emission or not ? Given : Ce3 x
10 m/siand 1 eVE1.6 x10-1J, h= 6.6x10- Js.
Chapter 39 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 39.1 - Prob. 39.1QQCh. 39.2 - Prob. 39.2QQCh. 39.2 - Prob. 39.3QQCh. 39.2 - Prob. 39.4QQCh. 39.3 - Prob. 39.5QQCh. 39.5 - Prob. 39.6QQCh. 39.6 - Prob. 39.7QQCh. 39 - Prob. 1PCh. 39 - Prob. 2PCh. 39 - Prob. 3P
Ch. 39 - Prob. 4PCh. 39 - Prob. 5PCh. 39 - Prob. 6PCh. 39 - Prob. 8PCh. 39 - Prob. 9PCh. 39 - Prob. 10PCh. 39 - Prob. 11PCh. 39 - Prob. 12PCh. 39 - Prob. 13PCh. 39 - Prob. 15PCh. 39 - Prob. 16PCh. 39 - Prob. 17PCh. 39 - Prob. 18PCh. 39 - Prob. 19PCh. 39 - Prob. 20PCh. 39 - Prob. 22PCh. 39 - Prob. 23PCh. 39 - Prob. 24PCh. 39 - Prob. 25PCh. 39 - Prob. 26PCh. 39 - Prob. 27PCh. 39 - Prob. 30PCh. 39 - Prob. 31PCh. 39 - Prob. 32PCh. 39 - Prob. 33PCh. 39 - Prob. 35PCh. 39 - Prob. 37PCh. 39 - Prob. 38PCh. 39 - Prob. 39PCh. 39 - Prob. 40APCh. 39 - Prob. 41APCh. 39 - Prob. 43APCh. 39 - Prob. 44APCh. 39 - Prob. 45APCh. 39 - Prob. 46APCh. 39 - Prob. 47CPCh. 39 - Prob. 48CPCh. 39 - Prob. 49CPCh. 39 - Prob. 50CP
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