Question

2. The speed of light is a medium with critical angle 45° is
(a) C=3x10ms (b) CV2
(c) C/V2​

Answer 1

Answer:

opt A

Explanation:

n= 1/sinC = 1/sin45° = √2

Therefore speed of light in vaccum = speed of light in air/n = 3×10^8/1.414 = 2.121×10^8 m/s