Question

The refractive index of glass with respect to air is 2. Then the critical angle of glass air interface is? ​

Answer 1

Answer:

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Answer 2

Explanation:

let n1 be refractive index of glass and n2 is refractive index of air

from snell law

n1.sinθ=n2.sin90

θ=c (critical angle)

n1/n2=1/sinc

2=1/sinc

sinc=1/2

c=pie/4 or 45 degrees