question_answer

In an experiment for determination of refractive index of glass of a prism by \[i-\delta ,\] plot, it was found that a ray incident at angle 35°, suffers a deviation of 40° and that it emerges at angle 79°. In that case which of the following is closest to the maximum possible value of the refractive index?                  [JEE MAIN - I 3-4-2016]

A) 1.8

B) 1.5

C) 1.6

D) 1.7

Correct Answer: B

Solution :

[b]

and

solving these, we get