Light with a single wavelength of 490 nm impacts a metal surface releasing an electrons.  How much energy in Joules is in each photo of this light? ________ What is the energy in eV of a photon whose wavelength is 490 nm?________ Light with a single wavelength of 490 nm impacts a metal surface releasing an electrons.  If the released electrons each have an energy of 1.9 eV, what is the work function of the metal in eV?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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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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Light with a single wavelength of 490 nm impacts a metal surface releasing an electrons.  How much energy in Joules is in each photo of this light? ________

What is the energy in eV of a photon whose wavelength is 490 nm?________

Light with a single wavelength of 490 nm impacts a metal surface releasing an electrons.  If the released electrons each have an energy of 1.9 eV, what is the work function of the metal in eV? _____

f the light source were brought closer to the surface so that the light reaching the surface was brighter which would change? ______

 

 
 
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