Published by:
CGP EDU Academic Team
Published on: September 12, 2026
If the critical angle for total internal reflection from a medium to vacuum is 30 0 the velocity of light in the medium is -
A
3 × 10 8 m/s
B
1.5 × 10 8 m/s
C
6 × 10 8 m/s
D
× 10 8 m/s
Text Solution
Verified by ExpertsThe correct answer is:
B
Sin i c = 
= 
= 
sin 30 0 = 
⇒ v d = 1.5 × 10 8 m/s
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