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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 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 =λ=450 nm = 450×109 m

Speed of radiation =c=3×108 ms

Energy of the radiation =E=?

Binding Energy of electrons =Wo=2.28 eV

Plank's constant =h=4.14×1015 eV s

Maximum kinetic energy of the electrons =KEmax

Formula Used:

Energy of radiation is given as

  E=hcλ

Maximum kinetic energy is given as

  KEmax=EWo

Calculati

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