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 perpendicular to each other, the angle of incidence i $s ______.$
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Question

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 perpendicular to each other, the angle of incidence i $s ______.$

Options

G1 Physics · Accepted Answer

When the reflected and refracted rays are perpendicular, the incidence angle is Brewster's angle. For incidence from medium 1 to medium 2, tan i(B) = n₂/n₁. Given, n₁ = 2, n₂ = 2√3. Therefore, tan i(B) = (2√3)/2 = √3. Hence, i(B) = 60°. Correct option: A.

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 perpendicular to each other, the angle of incidence i s ______.