The critical angle of a slab of m aterial tran sp aren t to light is `30^(@)`. Give th e refractive index of this m aterial

Options

A. `1.5`
B. 2
C. `0.5`
D. `1.6`

Answer

A

Explanation

Since `mu=(1)/(sin C )=(1)/(sin 30^(2))=2`