A ray of light is incident at the glass-water interface at . . .

Question : A ray of light is incident at the glass-water interface at an angle i (as shown below) and it emerges finally parallel to the surface of water, then the value of ng would be 

(A) (4/3) sin i
(B) 1/sin i
(C) sin i
(D) 3/4 sin i

Doubt by Ridhi

Ans : (B) 1/sin i

Detailed Solution : Coming Soon.