A light ray, going through a prism with the angle of prism 60°, is found to deviate by 30°. What limit on the refractive index can be put from these data?

Question

Philoid · Accepted Answer

Angle of prism =A =

Angle of deviation=

We know that;

Angle of minimum deviation is given by =

⇒

One ray is found to be deviated by. So, the angle of minimum deviation should be either less than or equal to It should not be more than

So,

Or,

⇒

So, limit on the refractive index =.