Question

In Davisson-Germer electron diffraction arrangement if suppose the voltage applied to accelerated electrons is increased, the value of the angles at which diffracted beam have the maximum intensity
A. will be larger than the earlier value.
B. will be the same as the earlier value.
C. will be less than the earlier value.
D. will depend on the target.

Answer 1

Correct Answer - C
As `lambda=12.27/sqrtVoverset(0)A`, when potential `(V)` is increased,`lambda`decreases as `2d sin theta=n lambda, theta` will be less than the earlier value.