Ain is , is 's of ? 0.62 0.79 1.27 1.50

Liquid's index of refraction, n₁ = 1.27

Explanation:

It is given that,

The critical angle for a liquid in air is,

We have to find the refractive index of the liquid. Critical angle of a liquid is defined as the angle of incidence in denser medium for which the angle of refraction is 90°.

Using Snell's law as :

Here,

Where

n₂ = Refractive index of air = 1

n₁ = refractive index of liquid

So,

n₁ = 1.269

or n₁ = 1.27

Hence, the refractive index of liquid is 1.27