Chapter 29, Problem 7PE

### 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

# Calculate the binding energy in eV of electrons in aluminum, if the longest-wavelength photon that can eject them is 304 nm.

To determine

The binding energy in eV of the electrons in aluminum.

Explanation

Given:

Frequency of photon =f

Wavelength of photon =Î»=304Â nmÂ =Â 304Ã—10âˆ’9Â m

Speed of photon =c=3Ã—108Â ms

Energy of the photon =E=?

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

Formula Used:

Frequency of the photon is given as

â€ƒâ€ƒf=cÎ»

Binding energy of electrons is given as

â€ƒâ€ƒE=hf

Calculation:

Frequency of the photon is given as

â€ƒâ€ƒf=c

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