A) 10
B) 20
C) 30
D) 35
E) 40
Correct Answer: E
Solution :
Optical thickness of plate \[=(\mu -1)\,t=20\lambda \] We know that number of fringes crossing the field of view are given by \[n=\frac{2\,(\mu -1)\,t}{\lambda }\] \[=\frac{2\times 20\,\lambda }{\lambda }=40\]You need to login to perform this action.
You will be redirected in
3 sec