Question

2. If the critica angle for total internal reflection from a medium to vacuum
is 30 degree, the velocity of light in the medium is
(a) 3 x 10 m/s
(b) 1.5 x 103 m/s
(c) 0.5 X m/s
0 (d) 0.2 x 10 m/s​

Answer 1

Answer:

(a) 3 × 10 m/s this correct answer