Home
Class 12
PHYSICS
A ray of light AO in vacuum is incident ...

A ray of light AO in vacuum is incident on a glass slab at angle `60^(@)`and refracted at angle `30^(@)` along OB as shown in the figure.The optical path length of light ray from A to B is

A

` 2 a + (2 b)/( 3)`

B

`( 2 sqrt(3))/(a) + 2b`

C

2a + 2b

D

` 2 a + (2 b)/( sqrt(3))`

Text Solution

Verified by Experts

The correct Answer is:
C
From Snails law
`1 . sin 60^(@) = mu . sin 30^(@)`
`rArr mu = sqrt(3)`
Optical path ` = AO + mu (OB)`
`= (a)/( cos 60^(@)) + sqrt(3) (b)/( cos 30^(@))`
`= 2a + 2b `
Promotional Banner

Similar Questions

Explore conceptually related problems

A ray of light falls on a glass slab at an incident angle of 45^(@) and refracted at angle of 30^(@) . What is the refractive index of the glass with respect to air ?

A ray of light falls on a glass slab at an incident angle of 45^(@) and refracted at angle of 30^(@) . What is the measure of the angle of emergence 'e' ?

A ray of light is incident on a glass slab at an angle of 45^(@) . If refractive index of glass be 1.6, what is the angle of refraction ?

A ray of light falls on a material body at an incident angle 60^(@) and refracted at angle 30^(@) . What is the refractive index of the material?

A ray of light falls on a material body at an incident angle of 30^(@) and refracted at angle 60^(@) . What is the refractive index of the material?

A ray of light falls on a material body at an incident angle 60^(@) and refracted at angle 30^(@) . What is the measure of the angle of emergence 'e'?

A ray of light is incident on a glass slab of refractive index 1.5, making an angle of 40^(@) with the surface. The angle of refraction in glass is

A ray of light is incident on a glass slab making an angle of 30^@ with the surface. The angle of refraction in glass, if the refractive index of flass is 1.6 , is

A ray of light is incident on a galss slab making on angle of 30^(@) with the surface . If the angle of refraction in glass is 33^(@) , the angle of deviation of the ray during its passage through the galss slab is