Question

Determine the refractive index of benzene if the critical angle of benzene with respect to air is 42 degrees

Answer 1

Explanation:

Given: the critical angle is 42

∘

To find the refractive index of benzene

Solution:

Let the critical angle be C and refractive index be μ.

According to Snell’s Law,

C=sin −1 ( μ1 )⟹42 ∘ =sin −1 ( μ1 )⟹sin(42 ∘ ) μ= 0.671=1.49is the required refractive index of benzene.

Answer 2

refractive index =1.49

Explanation:

critical angle of benzene =42

we know that sin c =1/refractive index

sin 42 = 1/refractive index of benzene

refractive index of benzene = 1/sin 42 =1/0.6691 = 1.49