Question

The critical angle for light going from medium X into medium Y is `theta` . The speed of light in medium X is v. The speed of light in medium Y is
A. `v/(sin theta)`
B. `v sin theta`
C. `v cot theta`
D. `v tan theta`

Answer 1

Correct Answer - A
`n_(A) sin theta=n_(B) sin 90^(@)`
`V=C/(n_(A))`
`V_(B)=C/(n_(B))`
`V_(B)=C/(n_(A) sin theta)=V/(sin theta)`