Question

The refractive index with respect to glass slab is 2. then the critical angle of glass-air interface is ______
pls explain.....

Answer 1

Hey there!

We know that

Relative refractive index = 2

so According to snell's law sini / sinr =2.

and sini/sinr 1/ sinc

2 = 1/ sin c

sinc = 1/2

sinc = sin30

c=30°

Critical angle = 30°

hope helped !

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