An unpolarised light is incident at an interface of two dielectric media having refractive indices of 2 (incident medium) and 2 3 (medium) respectively. To satisfy the condition that reflected and refracted rays are

Question

Quantrex Academy · Accepted Answer

Correct answer: B. 60^

For reflected and refracted rays to be perpendicular, if

i

is the angle of incidence and

r

is the angle of refraction, then

i + r = 90°

, giving

r = 90° - i

.
Applying Snell's law:

n_1 \sin i = n_2 \sin r

2 \sin i = 2\sqrt{3} \sin(90° - i)

2 \sin i = 2\sqrt{3} \cos i

\tan i = \sqrt{3}

i = 60°

An unpolarised light is incident at an interface of two dielectric...

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