Question

A ray of light reflected from a surface of glass makes an angle of 90°with the refracted ray. Find the angle of incidence and angle of refraction given ng=1.6

Answer 1

$\sin(c) \div \sin(90 ) = 1 \div 1.6$
$\sin(c) = 0.625$
$c = 23$
angle of incidence is 23

Answer 2

HERE IS YOUR ANSWER ☝

FOR THE GIVEN QUESTION