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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

What is the longest-wavelength EM radiation that can eject a photoelectron from silver, given that the binding energy is 4.73 eV? Is this in the visible range?

To determine

The longest wavelength the EM radiation can eject and if it is in the visible range or not.

Explanation

Given:

Frequency of radiation =f

Wavelength of radiation =λ

Speed of EM radiation of radiation =c=3×108 ms

Energy of the radiation =E=4.73 eV

Plank's constant =h=4.14×1015 eV s

Formula Used:

Wavelength of the radiation is given as

  λ=cf

Energy of radiation is given as

  E=hf

Calculation:

Energy of radiation is given as

  E=hf

Inserting the values

  4.73=(4.14×1015)ff=4.734.14×1015f=1

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