Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 34, Problem 4P
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(c) The energy of an ultraviolet light is 3.28 eV.
(i) What is its wavelength? (Given: h=6.63✕10-34 Js ; e=1.602✕10-19 C).
(ii) Based on the de Broglie's hypothesis, determine the velocity of the electron. (Given: h=6.63✕10-34 Js ; me=9.11✕10-31 kg).
In a photoelectric experiment using a Caesium surface, you irradiate the surface with five different wavelengths and
find five corresponding stopping potentials:
#
Vo
|1. 232пт 2.93V
2.
58пт
20.84V
3.
290nm 2.02V
4.
174пт 4.50V
|5.
116пт 8.23у
Plot a graph of the Stopping Potential versus Frequency of the light.
What is the theoretical value of the slope of this plot?
X10-15
J. s/C
What value did you find?
x10-15 J. s/C
What is your value for the cutoff frequency?
х1015 Hz
The energy of an ultraviolet light is 3.28 eV.
(i) What is its wavelength? (Given: h=6.63✕10-34 Js ; e=1.602✕10-19 C).
(ii) Based on the de Broglie's hypothesis, determine the velocity of the electron. (Given: h=6.63✕10-34 Js ; me=9.11✕10-31 kg).
Chapter 34 Solutions
Physics for Scientists and Engineers
Ch. 34 - Prob. 1PCh. 34 - Prob. 2PCh. 34 - Prob. 3PCh. 34 - Prob. 4PCh. 34 - Prob. 5PCh. 34 - Prob. 6PCh. 34 - Prob. 7PCh. 34 - Prob. 8PCh. 34 - Prob. 9PCh. 34 - Prob. 10P
Ch. 34 - Prob. 11PCh. 34 - Prob. 12PCh. 34 - Prob. 13PCh. 34 - Prob. 14PCh. 34 - Prob. 15PCh. 34 - Prob. 16PCh. 34 - Prob. 17PCh. 34 - Prob. 18PCh. 34 - Prob. 19PCh. 34 - Prob. 20PCh. 34 - Prob. 21PCh. 34 - Prob. 22PCh. 34 - Prob. 23PCh. 34 - Prob. 24PCh. 34 - Prob. 25PCh. 34 - Prob. 26PCh. 34 - Prob. 27PCh. 34 - Prob. 28PCh. 34 - Prob. 29PCh. 34 - Prob. 30PCh. 34 - Prob. 31PCh. 34 - Prob. 32PCh. 34 - Prob. 33PCh. 34 - Prob. 34PCh. 34 - Prob. 35PCh. 34 - Prob. 36PCh. 34 - Prob. 37PCh. 34 - Prob. 38PCh. 34 - Prob. 39PCh. 34 - Prob. 40PCh. 34 - Prob. 41PCh. 34 - Prob. 42PCh. 34 - Prob. 43PCh. 34 - Prob. 44PCh. 34 - Prob. 45PCh. 34 - Prob. 46PCh. 34 - Prob. 47PCh. 34 - Prob. 48PCh. 34 - Prob. 49PCh. 34 - Prob. 50PCh. 34 - Prob. 51PCh. 34 - Prob. 52PCh. 34 - Prob. 53PCh. 34 - Prob. 54PCh. 34 - Prob. 55PCh. 34 - Prob. 56PCh. 34 - Prob. 57PCh. 34 - Prob. 58PCh. 34 - Prob. 59PCh. 34 - Prob. 60PCh. 34 - Prob. 61PCh. 34 - Prob. 62PCh. 34 - Prob. 63PCh. 34 - Prob. 64PCh. 34 - Prob. 65PCh. 34 - Prob. 66PCh. 34 - Prob. 67PCh. 34 - Prob. 68PCh. 34 - Prob. 69PCh. 34 - Prob. 70PCh. 34 - Prob. 71PCh. 34 - Prob. 72PCh. 34 - Prob. 73P
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- Show that Stefan’s law results from Planck’s radiation law. Hin: To compute the total power of blackbody radiation emitted across the entire spectrum of wavelengths at a given temperature, integrate Planck’s law over the entire spectrum P(T)=0I(,T)d. Use the substitution x=hckT and the tabulated value of the integral 0dx x 3( e x 1)=415arrow_forwardWhat is the de Brogue wavelength of a proton whose kinetic energy is 2.0 MeV? 10.0 MeV?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
- At what velocity will an electron have a wavelength of 1.00 m?arrow_forwardIn a beam of white light (wavelengths from 400 to 750 nm), what range of momentum can the photons have?arrow_forwardWhat is the maximum kinetic energy of photoelectrons ejected from sodium by the incident radiation of wavelength 450 nm?arrow_forward
- In an experiment of photoelectric effect, no current flows through the circuit when the voltage across the anode and cathode is -1.70 V. Calculate a) b) If it is illuminated by ultraviolet radiation of frequency 1.70 x 1015 Hz. 5. the work function the threshold wavelength of the metal (cathode) [Ans: 8.55×1019 J, 233 nm]arrow_forwardWhen ultraviolet light with a wavelength of 400nm falls on a certain metal surface, the maximum kinetic energy of the emitted electrons is measured to be 1.10ev. What is the maximum kinetic energy of the electrons I joules when light of wavelength 300nm falls on the surface.arrow_forward(b) A/ The work function of a certain metal is o = 4.15 eV. Determine the minimum frequency of light for which photoelectrons are emitted from the metal. (Planck's constant is: h = 4.1357x10^-15 eV s.) (c) B/ Determine the corresponding wavelength of light. (Possibly useful constant: hc = 1240 eVnm.) Correction: the work function is = 5.30 eV; (a) C/ Calculate the kinetic energy of the emitted electrons if the frequency of the photons is doubled.arrow_forward
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