If the critical angle for total internal reflection from a medium to vacuum is 30°, then velocity of light in the medium is
A. 6 x 108 m/sec
B. 2 x 108 m/sec
C. 3 x 108 m/sec
D. 1.5 x 108 m/sec
Answer:C
If the critical angle for total internal reflection from a medium to vacuum is 30°, then velocity of light in the medium is
A. 6 x 108 m/sec B. 2 x 108 m/sec C. 3 x 108 m/sec D. 1.5 x 108 m/sec