Physics for Scientists and Engineers, Vol. 1
6th Edition
ISBN: 9781429201322
Author: Paul A. Tipler, Gene Mosca
Publisher: Macmillan Higher Education
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Question
Chapter 34, Problem 22P
(a)
To determine
The work function for silver
(b)
To determine
The maximum kinetic energy of the electrons
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The work function for indium is 4.12 eV.
(a) Convert the value of the work function from electron volts to joules. J(b) Find the cutoff frequency for indium. Hz(c) What maximum wavelength of light incident on indium releases photoelectrons from the indium's surface? nm(d) If light of energy 8.64 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 8.64 eV, what stopping potential would be required to arrest the current of photoelectrons? V
When 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?
The work function for potassium and
caesium are 2.25 eV and 2.14 eV respectively,
will the photoelectric emission occur for either
of these elements (a) with incident light of
wavelength 5650 A.U. and (b) width light of
wavelength 5180 A.U.
Chapter 34 Solutions
Physics for Scientists and Engineers, Vol. 1
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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- The work function for potassium is 2.26 eV. What is the cutoff frequency when this metal is used as photoelectrode? What is the stopping potential when for the emitted electrons when this photo electrode is exposed to radiation of frequency 1200 THz?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 de Brogue wavelength of a proton whose kinetic energy is 2.0 MeV? 10.0 MeV?arrow_forwardA light source of wavelength λ illuminates a metal and ejects photo electrons with amaximum kinetic energy of 2 eV. A secondlight source with half the wavelength of thefirst ejects photoelectrons with a maximumkinetic energy of 3.8 eV.What is the work function of the metal?Answer in units of eV.arrow_forward(a) A photoelectric experiment is performed where green light with a wavelength of 546.1 nm is shined on a metal plate, creating a photocurrent from it to a collector plate. When the potential difference between the metal plate and the collector is increased to a magnitude of 0.686 V, the photocurrent goes to zero—in other words, this is the stopping potential. What is the work function (in eV) for this metal? answer in eV (b) The experiment is performed again with the same metal, but now red light with a wavelength 650.0 nm is shined on it. What is the new stopping potential (in V) in this case? answer in Varrow_forward
- The threshold wavelength for silver is 3800 A. Calculate the photoelectric work function for silver in eV.arrow_forwardThe work function for silver is 4.73 eV. (a) Convert the value of the work function from electron volts to joules.answer in J(b) Find the cutoff frequency for silver.answer in Hz(c) What maximum wavelength of light incident on silver releases photoelectrons from the silver's surface?answer in nm(d) If light of energy 8.84 eV is incident on silver, what is the maximum kinetic energy of the ejected photoelectrons? Give the answer in electron volts.answer in V(e) For photons of energy 8.84 eV, what stopping potential would be required to arrest the current of photoelectrons?answer in Varrow_forwardAluminium has a work function of 4.08 eV. (a) Find the cutoff wavelength and cutoff frequency for the photoelectric effect. wavelength nm frequency Hz (b) What is the stopping potential if the incident light has a wavelength of 159 nm? V Need Help? Read Itarrow_forward
- A photoelectric experiment with cesium yields stopping potentials of 0.95 V and0.38 V for λ = 435.8 nm and λ = 546.1 nm, respectively. Using only these numberstogether with the values of the speed of light (3 ×108 m/s) and the electron charge (e = -1.6 ×10−19 C), find(a) the work function in eV for cesium,(b) the value for Planck’s constant h, and(c) the cutoff frequency, below which no electrons would be emitted.arrow_forwardHow to solve this questionarrow_forwardWhen ultraviolet light with a wavelength of 400.0 nm falls on a certain metalsurface,the maximum kinetic energy of the emitted electrons is measured to be1.10 eV.What is the maximum kinetic energy of the electrons in Joules when lightof wavelength 300.0 nm falls on the surface?arrow_forward
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