WB JEE 2016 | Geometrical Optics Question 24 | Physics

WB JEE 2016

MCQ (Single Correct Answer)

-0.25

A ray of light strikes a glass plate at an angle of 60$$^\circ$$. If the reflected and refracted rays are perpendicular to each other, the refractive index of glass is

$${{\sqrt 3 } \over 2}$$

$${3 \over 2}$$

$${1 \over 2}$$

$${\sqrt 3 }$$

WB JEE 2016

MCQ (Single Correct Answer)

-0.25

Light travels through a glass plate of thickness t and having refractive index $$\mu$$. If c be the velocity of light in vacuum, time taken by the light to travel through this thickness of glass is

$${t \over {\mu c}}$$

$${{tc} \over \mu }$$

$${{\mu t} \over c}$$

$$\mu \,tc$$

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