Question

A ray of light passing from glass of water is incident on the glass-water interface at ${65}^0$. If the critical angle for the pair of media is ${63}^0$:

• A. the ray will emerge into water with a deviation of $2^0$ from the normal
• B. the ray will be refracted into water with a deviation of $2^0$
• C. the ray will be totally internally reflected back into glass with a deviation of ${50}^0$
• D. the ray will be totally internally reflected back into glass with a deviation of $2^0$

Answer 1

Answer: (C)

the ray will be totally internally reflected back into glass with a deviation of ${50}^0$

As $i>C$, the ray undergo total internal reflection.
Deviation, $d=\pi -2i=180-2\times 65={50}^0$