Question

A photon of frequency f under goes compton scattering from an electron at rest and scatters through an angle $\theta$. The frequency of scattered photon is $f^{{}^{\prime }}$ then

• A. $f^{{}^{\prime }}>f$
• B. $f^{{}^{\prime }}=f$
• C. $f^{{}^{\prime }}<f$
• D. None of these

Answer 1

Answer: (C)

$f^{{}^{\prime }}<f$

After scattering the wavelength of scattered photon increases due to the loss of energy and hence, the frequency decreases.
So, $f^{\prime }<f$
So, the answer is option (C).