Question

A ray incident at a point at an angle of incidence 60ŗ, enters a glass sphere (m= $\sqrt { 3 }$) and is reflected and refracted at the further surface of the sphere. The angle between the reflected and refracted rays at this surface is –

• A. 50⁰
• B. 60⁰
• C. 90⁰
• D. None of these

Answer 1

Answer: (C)

90⁰

Answer 2

At P

$\frac { 1 } { \sqrt { 3 } }$

\ r₁ = 30⁰

r₁ = r₂ = 30⁰

At Q

$\frac { 1 } { \sqrt { 3 } }$

\ i₂ = 60⁰

\ At point Q ;

a = 180⁰ – (r₂ + i₂) = 90⁰