Question

A ray of light is incident on a substance of refractive index mu at an angle of incidence of 60 degrees . If the angle of refraction was 30 degrees .

find mu ^ 2​

Answer 1

Answer:

The angle of incidence is angle between the Ray and the normal. You get 90°–60°=30°. Cheerio. The answer would be 30°.

Answer 2

Answer:

We have to calculate the refractive index.

Explanation:

Concept:

Snell's law: It represent the incident and refractive rays with their angles. It is the ratios of sine of the angle of incident to the sine of angle of refraction. It is written as;

μ₁sinθ₁ = μ₂sinθ₂

Given:

μ₁ = 1

θ₁ = 60°

θ₂= 30°

To find:

μ₂²=?

Using Snell's law we have;

1×sin(60)= μ₂sin(30)

$\frac{\sqrt{3} }{2}$=μ₂×$\frac{1}{2}$

μ₂=$\sqrt{3}$

μ₂²=3

Result:

Hence, the refractive index is μ₂²=3