Home
Class 11
PHYSICS
In the figure ABC is the cross-section o...

In the figure ABC is the cross-section of a right angled prism and BCDE is the cross-section of a glass slab. The value of theta so that light incident normally on the face AB does not cross the face BC is `(Given sin^-1 3//5=37^@)`

A

`thetale37^(@)`

B

`thetagt37^(@)`

C

`thetale53^(@)`

D

`thetalt53^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A

For total internal reflection `rArr`` 90^(@)-thetageC`
`90^(@)-Cgetheta……(1)`
For refraction at surface Bc
`(3)/(2)"sin" C =(3)/(5)sin 90^(@) rArr sinC=(4)/(5)`
`C=53^(@)......(2)` from 1&2 `rArr 90^(@)-53^(@)getheta rArr 37^(@)getheta`
Promotional Banner

Similar Questions

Explore conceptually related problems

In figure, ABC is the cross section of a right-angled prism and ACDE is the cross section of a gless slab. The value of theta so that light incident normally on the face AB does not cross the face AC is (given sin^(-1)(3//5)=37^(@)).

What is the refractive index of the material of the glass prism shown in the figure, if a ray of light incident normally at the face AB emerges along the face AC?

What should be the value of angle theta so that light entering normally through the surface AC of a prism (n=3//2) does not cross the second refracting surface AB?

What should be the value of angle  so that light entering normally through the surface AC of a prism (n = 3/2) does not cross the second refracting surface AB.

A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach on the face BC if.

A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach the face BC , Fig. if : .

Figure shows a right angled prism ABC having refractive mu_(g)=(3)/(2) lowered into water (mu_(omega)(4)/(3)) . Find angle alpha so that the incident ray normal to face AB will be reflected at face BC completely.

An equilateral triangular prism is made of glass (mu = 1.5) . A ray of light is incident normally on one of the faces. The angle between the incident and emergent ray is