Question

Light enters from air into a given medium at an angle of 45° with interface of the air-medium surface. After refraction, the light ray is deviated through an angle of 15° from its original direction. The refractive index of the medium is

• A. 1.732
• B. 1.333
• C. 1.414
• D. 2.732

Answer 1

Answer: (C)

1.414

Answer 2

1×sin 45∘=μ×sin 30∘
$⇒μ=\frac{1}{√2}×\frac{2}{1}$
⇒μ=√2
⇒μ=1.414
So, the correct option is (C): 1.414