College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question
Chapter 27, Problem 9P
(a)
To determine
The work function of potassium.
(b)
To determine
The cutoff wavelength.
(c)
To determine
The frequency corresponding to the cutoff wavelength.
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When light of wavelength 3.50 x 102 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. Find (a) the work function of potassium, (b) the cutoff wavelength, and (c) the frequency corresponding to the cutoff wavelength.
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Chapter 27 Solutions
College Physics
Ch. 27.5 - Prob. 27.1QQCh. 27.5 - Prob. 27.2QQCh. 27.5 - Prob. 27.3QQCh. 27.6 - Prob. 27.4QQCh. 27.6 - Prob. 27.5QQCh. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - Prob. 3CQCh. 27 - Prob. 4CQCh. 27 - Prob. 5CQ
Ch. 27 - Prob. 6CQCh. 27 - Prob. 7CQCh. 27 - Prob. 8CQCh. 27 - Prob. 9CQCh. 27 - Prob. 10CQCh. 27 - Prob. 11CQCh. 27 - Prob. 12CQCh. 27 - Prob. 13CQCh. 27 - Prob. 14CQCh. 27 - Prob. 15CQCh. 27 - Prob. 16CQCh. 27 - Prob. 1PCh. 27 - Prob. 2PCh. 27 - Prob. 3PCh. 27 - Prob. 4PCh. 27 - Prob. 5PCh. 27 - Prob. 6PCh. 27 - Prob. 7PCh. 27 - Prob. 8PCh. 27 - Prob. 9PCh. 27 - Prob. 10PCh. 27 - Prob. 11PCh. 27 - Prob. 12PCh. 27 - Prob. 13PCh. 27 - Prob. 14PCh. 27 - Prob. 15PCh. 27 - Prob. 16PCh. 27 - Prob. 17PCh. 27 - Prob. 18PCh. 27 - Prob. 19PCh. 27 - Prob. 20PCh. 27 - Prob. 21PCh. 27 - Prob. 22PCh. 27 - Prob. 23PCh. 27 - Prob. 24PCh. 27 - Prob. 25PCh. 27 - Prob. 26PCh. 27 - Prob. 27PCh. 27 - Prob. 28PCh. 27 - Prob. 29PCh. 27 - Prob. 30PCh. 27 - Prob. 31PCh. 27 - Prob. 32PCh. 27 - Prob. 33PCh. 27 - Prob. 34PCh. 27 - Prob. 35PCh. 27 - Prob. 36PCh. 27 - Prob. 37PCh. 27 - Prob. 38PCh. 27 - Prob. 39PCh. 27 - Prob. 40PCh. 27 - Prob. 41APCh. 27 - Prob. 42APCh. 27 - Prob. 43APCh. 27 - Prob. 44APCh. 27 - Prob. 45APCh. 27 - Prob. 46APCh. 27 - Prob. 47APCh. 27 - Prob. 48APCh. 27 - Prob. 49APCh. 27 - Prob. 50APCh. 27 - Prob. 51APCh. 27 - Prob. 52AP
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- If the work function of a metal is 3.2 eV, what is the maximum wavelength that a photon can have to eject a photoelectron from this metal surface?arrow_forwardWhat is the de Brogue wavelength of a proton whose kinetic energy is 2.0 MeV? 10.0 MeV?arrow_forwardWhen light of wavelength 150 nm falls on a potassium surface, electrons having a maximum kinetic energy of 6.04 eV are emitted. Find values for the following. (a) the work function of potassium eV (b) the cutoff wavelength nm (c) the frequency corresponding to the cutoff wavelength Hzarrow_forward
- When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. Find (a) the work function of potassium, (b) the cutoff wavelength, and (c) the frequency corresponding to the cutoff wavelengtharrow_forwardWhen ultraviolet light with a wavelength of 400.0 nm 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 in joules when light of wavelength 300.0 nm falls on the surface?arrow_forwardLight with wavelength i = 610 nm is incident on a metallic surface. Electrons are ejected from the surface. The maximum speed of these electrons is v = 4.40 x 105 m/s. (a) What is the work function of the metal (in ev)? ev (b) What is the cutoff frequency for this metal (in Hz)? Hzarrow_forward
- When sodium metal is illuminated with light of wavelength 4.20 × 102 nm, the stopping potential is found to be 0.65V; when the wavelength is changed to 3.10 × 102 nm, the stopping potential is 1.69V. Using only these data and the values of the speed of light (? = 3 × 108 m/?) and the electronic charge (? = 1.602 × 10−19 C), find the work function of sodium and a value of the Planck’s constant.arrow_forwardWhen light of wavelength 220 nm falls on a gold surface, electrons having a maximum kinetic energy of 0.54 eV are emitted. Find values for the following. (a) the work function of gold answer in eV (b) the cutoff wavelength answer in nm (c) the frequency corresponding to the cutoff wavelength answer in Hzarrow_forwardIn the photoelectric effect, electrons are ejected from a metal surface when light strikes it. A certain minimum energy, Emin, is required to eject an electron. Any energy absorbed beyond that minimum gives kinetic energy to the ejected electron. It is found that when light at a wavelength of 540 nm falls on a cesium surface, an electron is ejected with a kinetic energy of 2.60 x 10-20 J. When the wavelength is 400 nm, the kinetic energy is 1.54 x 10-19 J. Calculate Emin for cesium in joules Calculate the longest wavelength, in nanometers, that will eject electrons from cesium.arrow_forward
- When light with a wavelength of 219 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 3.32×10−193.32×10−19 J. Determine the wavelength of light that should be used to triple the maximum kinetic energy of the electrons ejected from this surface.arrow_forwardLight with wavelength ? = 635 nm is incident on a metallic surface. Electrons are ejected from the surface. The maximum speed of these electrons is v = 4.40 ✕ 105 m/s. a) What is the work function of the metal (in eV)? b) What is the cutoff frequency for this metal (in Hz)?arrow_forwardA sheet of metal is illuminated by photons with a wavelength of 325 nm and the emitted electrons are found to have a maximum kinetic energy of 1.25 eV. If the same metal is illuminated by 225 nm light, what will be the maximum speed of emitted electrons? Give your answer in km/s to 3 significant digits.arrow_forward
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