Question

Which of the following is correct in Compton effect?
A. X-ray photon strikes an electron which is at rest,
B. Maximum Compton shift is few metres,
C. Maximum Compton shift is \(0.0484\ \text{\AA}\),
D. An electron strikes on metal surface.

• A. A, B only
• B. A, D only
• C. A, B, C only
• D. A, C only

Hint:

Compton effect involves scattering of X-rays by electrons and the maximum wavelength shift is about \(0.0484\ \text{\AA}\).

Answer 1

The Correct Option is D

Concept:
Compton effect is the scattering of X-ray photons by nearly free electrons.

Step 1: Check statement A.
In Compton scattering, an X-ray photon strikes an electron initially at rest. \[ A \text{ is correct} \]

Step 2: Check statement B.
Maximum Compton shift is not of the order of metres. \[ B \text{ is incorrect} \]

Step 3: Check statement C.
Maximum Compton shift is: \[ \Delta\lambda_{\max}=2\lambda_C \] \[ \Delta\lambda_{\max}\approx0.0484\ \text{\AA} \] \[ C \text{ is correct} \]

Step 4: Check statement D.
Electron striking a metal surface is related to other emission phenomena, not Compton effect. \[ D \text{ is incorrect} \] Therefore: \[ A,C \] \[ \therefore \text{Correct Answer is (D)} \]