Solve Study Textbooks Guides

Use app

Login

>>Class 12
>>Physics
>>Ray Optics and Optical Instruments
>>Total Internal Reflection
>> $A ray of light is travelling inside a re$

Question

A ray of light is travelling inside a rectangular glass block of refractive index $2$ and incidents on glass-air interface at an angle of incidence 45 $^{\circ}$ . Under these conditions, the ray

A

will emerge into air with an angle of deviation $0$ $^{\circ}$

B

will be reflected back into the medium

C

will be absorbed

D

will just graze the surface of seperation of the two media

Medium

Open in App

Updated on : 2022-09-05

Solution

Verified by Toppr

Correct option is D)

$μ s i n i = s i n r$

$2 s i n 45 = s i n r$

=> $r = 9 0^{\circ}$

Therefore the angle of refraction is $9 0^{\circ}$ .

So the ray will just graze the surface of separation of the two media.

Was this answer helpful?

0

0

Similar questions

A ray of light traveling in a transparent medium falls on a surface separating the medium from the air at an angle of incidence of $4 5^{\circ}$ . The ray undergoes total internal reflection. If $n$ is the refractive index of the medium with respect to air, select the possible value(s) of $n$ from the following.

This question has multiple correct options

A ray of light strikes a transparent rectangular slab of refractive index $2$ at an angle of incidence of $4 5^{o}$ . The angle between the reflected and refracted rays is:

A ray of light is travelling from glass to air. (Refractive index of glass $= 1.5$ ). The angle of incidence is $5 0^{o}$ .The deviation of the ray is

The critical angle of glass-air interface is (given $μ_{g l a s s} = 1.5$ ):

A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence 45 $^{\circ}$ . The ray undergoes total internal reflection. The possible value of refractive index of the medium with respect to air is

More From Chapter

Ray Optics and Optical Instruments

View chapter >

Revise with Concepts

Total Internal Reflection and Critical angle

ExampleDefinitionsFormulaes

Optical Fibres

ExampleDefinitionsFormulaes

Critical Angle - Formula

ExampleDefinitionsFormulaes

Applications of Total Internal Reflection

ExampleDefinitionsFormulaes

Prism binoculars

ExampleDefinitionsFormulaes

View more

Learn with Videos

Can you see Internal Reflection?

Total internal reflection and critical angle

Advanced applications of total internal reflection

Total Internal Reflection Through Prism

Practice more questions

JEE Advanced Questions

Medium Questions