Which of the following statements describes the condition-when is refraction of light NOT possible?
a) The angle of incidence is `0^(@)` . b) The two media have the same refractive index. c) The refractive index is higher then 3 . 0 .

Options

A. only a and B
B. only b and c
C. only a and c
D. a, b and c

Answer

A

Explanation

The refractive index in higher than 3 . 0 is incorrect. As long as the `anglei` is not `0^(@)` and there is a difference between the refractive indices of the two media involved, refraction will take place .