Question

the refractive index of a medium with respect to air is root 2 . if the angle of incidence of o ray of light is 45 degree calculate the angel of deviation for that ray in case of refraction.

Answer 1

Explanation:

From Snell's Law, μ=

sinr

sini

As r=

2

i

So, μ=

sin

2

i

sini

=

sin

2

i

2sin

2

i

cos

2

i

=2cos

2

i

⇒cos

2

i

=

2

μ

⇒

2

i

=cos

−1

2

μ

⇒i=2cos

−1

2

μ

.