Question Detail

PHY 104 Photo Electric Emission Objective Question

Question

In Compton Scattering, if the scattered photons have less energy after collision with electrons, what does this imply about their wavelength, according to the formula given?
Options
A They will have a shorter wavelength.
B They will have the same wavelength.
C They will have a larger wavelength.
Correct Answer
D Wavelength change is unrelated to energy change.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Page 9 states: 'The scattered photons will have less energy and less momentum after collision with electrons, and so should have a larger wavelength according to the formula: Δλ = λscattered - λincident = (h/mc)[1-cos(θ)]'. A positive Δλ means λscattered > λincident, indicating a larger wavelength.

Hint

Recall the inverse relationship between energy and wavelength for photons (E = hc/λ).

Question Info