JEE Main202226 Jul 2022Evening ShiftPhysicsRay OpticsActual
In the given figure, the face A C of the equilateral prism is immersed in a liquid of refractive index n . For incident angle 60 ° at the side A C , the refracted light beam just grazes along face A C . The refractive index of the liquid n = x 4 . The value of x is _____ . (Given refractive index of glass = 1 . 5 )
Correct answer
0
Step-by-step solution
When the refracted light just grazes the boundary the incident angle is called a critical angle. Using snell's law at face A C . 1 . 5 sin 60 ° = n × sin 90 ° ⇒ 1 . 5 × 3 2 = n = x 4 ⇒ 3 3 = x ⇒ x = 27