Question

the refractive index of the glass is 3/2.the critical angle for glass air surface​

Answer 1

Answer:

Critical angle c = sin ^{-1} ( 9/8)

Explanation:

Given:-

Refractive index of glass = 3/2

To find :-

Find critical angle.

Solution :-

Refractive index of water w.r.to air = 4/3

Refractive index of glass w.r.to air = 3/2

Therefore,

Refractive index of water w.r.to glass(n)

= (4/3)/(3/2)

= 8/9

Well know that,

n = 1/(sin c)

→ sin c = 1/n

→ sin c = 1/(8/9)

→ sin c = 9/8

Hence,

Critical angle c = sin ^{-1} ( 9/8)