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College Physics

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

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Chapter
Section
BuyFindarrow_forward

College Physics

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

What is the wavelength of EM radiation that ejects 2.00-eV electrons from calcium metal, given that the binding energy is 2.71 eV? What type of EM radiation is this?

To determine

The wavelength of the radiation and the type of radiation.

Explanation

Given:

Wavelength of radiation =λ=?

Speed of radiation =c=3×108 ms

Energy of the radiation =E=?

Binding Energy of electrons =Wo=2.71 eV

Plank's constant =h=4.14×1015 eV s

Kinetic energy of the electrons =KEmax=2 eV

Formula Used:

Energy of radiation is given as

  E=hcλ

Energy of radiation is given as

  E=Wo+KEmax

Calculation:

Energy of radiation is given as

  E=Wo+KEmax

Inserting the values

  E=2

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