Question

A light ray is incident normally on a prism as
shown in figure.
459
Critical angle of glass-air surface will be:
​

Answer 1

Answer:

Correct option is

C

> 1.41

sinr

sini

=n

answer c is correct

For total internal reflection θ>c

sinθ>sinc⇒sinθ>

μ

1

μ>

sinθ

1

⇒μ>

sin45

0

1

=μ>1.41