question_answer

      Refractive index of an optical medium changes with                        [NDA]

1. the nature of the medium.

2. the change in the angle of incidence of the ray.

3. colour of the incident ray.

Select the correct answer using the code given below:

A) 1 and 3 only     

B)      2 and 3 only

C) 1 and 2 only     

D)      1, 2 and 3