Chapter 29, Problem 13PE

### College Physics

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

Chapter
Section

### College Physics

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

# Find the wavelength of photons that eject 0.100-eV electrons from potassium, given that the binding energy is 2.24 eV. Are these photons visible?

To determine

Explanation

Given:

Binding Energy of electrons =Wo=2.24Â eV

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

Kinetic energy of the electrons =KEmax=0.100Â eV

Formula Used:

Energy of radiation is given as

â€ƒâ€ƒE=hcÎ»

Energy of radiation is given as

â€ƒâ€ƒE=Wo+KEmax

Calculation:

Energy of radiation is given as

â€ƒâ€ƒE=Wo+KEmax

Inserting the values

â€ƒâ€ƒE=2

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