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Chapter 29, Problem 8PE
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### College Physics

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

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Section
BuyFindarrow_forward

### College Physics

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

# What is the maximum kinetic energy in eV of electrons ejected from sodium metal by 450-nm EM radiation, given that the binding energy is 2.28 eV?

To determine

The maximum kinetic energy in eV of the electrons ejected from sodium metal.

Explanation

Given:

Wavelength of radiation =Î»=450Â nmÂ =Â 450Ã—10âˆ’9Â m

Speed of radiation =c=3Ã—108Â ms

Energy of the radiation =E=?

Binding Energy of electrons =Wo=2.28Â eV

Plank's constant =h=4.14Ã—10âˆ’15Â eVÂ s

Maximum kinetic energy of the electrons =KEmax

Formula Used:

Energy of radiation is given as

â€ƒâ€ƒE=hcÎ»

Maximum kinetic energy is given as

â€ƒâ€ƒKEmax=Eâˆ’Wo

Calculati

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