The refractive index of a glass is 1.520 for red light and 1.525 for blue light. Let `D_1` and `D_2` be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,

Options

A. `D_(1)ltD_(2)`
B. `D_(1)=D_(2)`
C. `D_(1)` can be less than or greater than `D_(2)` depending upon the angle of prism
D. `D_(1)gtD_(2)`

Answer

1

Explanation

D = `(mu-1)`A
For blue light `mu` is greater than that for red light, so `D_(2)gtD_(1)`