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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
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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Problem 7 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.) Find the wavelength of the incident light. 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. (a) (b) (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?
Transcribed Image Text:Problem 7 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.) Find the wavelength of the incident light. 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. (a) (b) (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?
Expert Solution
Step 1

Given Data:

Work potential of Nickel surface ϕ=5 eV

Stopping potential S0=4.5 volts

Power of Light source P=2.5 mW=2.5×10-3 W

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