Question

A beam of light in air is incident upon the smooth
plane surface of a piece of flint glass making an
angle of 30° with its plane. If the reflected beam
and refracted beam are perpendicular to each other,
what is the index of refraction of flint glass with
respect to air ? [NTSE, Stage-l(Bihar) 2016]
(A)1/2
(B)√3/2
(C)2/√3
(D) √3​

Answer 1

Answer:

B

Explanation:

......................

Answer 2

Answer:

→ (D) √3​

Explanation:

the index of refraction of flint glass with  respect to air = n

n = sin60°/sin30° = √3

choose ans. → (D) √3​