Light is incident on the surface of metallic nickel, from which 5.0 eV are required to remove an electron. The stopping potential is 4.5 volts. (Note that 1 eV = 1.6 x 10-19 J.) (a) Find the wavelength of the incident light. (b) Would this light emit any electrons from a metal whose work function is 8.4 eV? If so, determine the maximum kinetic energy of an emitted electron (in either J or eV). If not, explain why. (c) If the power of the light source is 2.5 mW, how much time is required for 2.0 x 1017 photons to be emitted by the source, and what is the momentum of each photon?

Light is incident on the surface of metallic nickel, from which 5.0 eV are required to remove an electron. The stopping potential is 4.5 volts. (Note that 1 eV = 1.6 x 10-19 J.) (a) Find the wavelength of the incident light. (b) Would this light emit any electrons from a metal whose work function is 8.4 eV? If so, determine the maximum kinetic energy of an emitted electron (in either J or eV). If not, explain why. (c) If the power of the light source is 2.5 mW, how much time is required for 2.0 x 1017 photons to be emitted by the source, and what is the momentum of each photon?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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