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3 years ago

5

A ray of light is incident on a flat surface of a block of polystyrene, with an index of refraction of 1.49, that is submerged i

n water. The ray is split at the surface, where the angle of refraction of the transmitted ray is 19.1°. What is the angle of reflection (in degrees) of the reflected ray?

1 answer:

Crazy boy [7]3 years ago

4 0

Answer:

21.5°

Explanation:

Given,

Refractive index of water, n₁ = 1.33

Refractive index of polystyrene, n₂ = 1.49

Angle of reflection = ?

Angle of refraction = 19.1°

Using Snell's law

n₁ sin θ₁ = n₂ sin θ₂

1.33 x sin θ₁ = 1.49 x sin 19.1°

sin θ₁ = 0.366

θ₁ = 21.5°

According to law of reflection angle of incidence is equal to angle of reflection.

Angle of reflection = 21.5°

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