Question

when the Ray of light incident normally on for effective surface when the Ray of light incident normally on the reflective surface breathing take place​

Answer 1

Explanation:

the ray undergoes total internal reflection at the second refracting surface.

μ=

sinC

1

=

sin60

1

=

3

2

sinC=

μ

1

⇒C=sin

−1

3

2

≅42

∘

θ<45

∘