Question

if the angle of incident 45 cm an a medium of refractive index 2 ,then find angle of refractive?​

Answer 1

Answer:

Correct option is

B

2cos

−1

2

μ

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

.