Question

A ray of light is incident on an interface
at a angle of 450 as is refracted to at
300 find
of
dre rare medium
Refractive index of the denser medium
Refractive indexo​

Answer 1

Given :

Angle of incident = 45°

Angle of refraction = 30°

To Find :

Refractive index of the denser medium.

Solution :

Laws of refraction :

• The incident ray, the normal to any refracting surface at the point of incidence and the refracted ray all lie in the same plane called the plane of incidence or plane of refraction$.$
• Sin(i)/Sin(r) = constant for any pair of media and for light of a given wave length. This is known as Snell's law.

For applying in problems;

• n₁ sin (i) = n₂ sin(r)

We know that, R.I. of air = 1

➠ n₁ sin (i) = n₂ sin(r)

➠ (1) sin (45°) = n₂ sin (30°)

➠ (1/√2) = n₂ × 1/2

➠ n₂ = 2/√2

➠ n₂ = √2

Answer 2

Explanation:

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