Home
Class 10
PHYSICS
A ray of light travelling in air falls o...

A ray of light travelling in air falls on the surface of a transparent slab. The ray makes an angle of `45^@` with the normal to the surface. Find the angle made by the refracted ray with the normal within the slab. Refractive index of the material of the slab `=sqrt2.`

Text Solution

Verified by Experts

We have, `("sin"i)/("sin"r) =n`
or `("sin" 45^@`)/("sin" r)= sqrt2`
or `"sin r" =1/sqrt2 xx "sin" 45^@ =1/sqrt2 xx 1/sqrt2 = 1/2.
This gives `r =30^@.`
Promotional Banner

Similar Questions

Explore conceptually related problems

A ray of light travelling in water is incident on its surface open to air. The angle of incidence is theta , which is less than the critical angle. Then there will be

A ray of light travelling in water is incident on a glass plate immersed in it. When the angle of incident is 51^(@) the reflected ray is totally plane polarized. Find the refractive index of glass. Refractive index of water is 1.33.

A ray of light is incident on the surface of a glass plate at an angle of incidence equal to Brewster's angle phi . If mu represents the refractive index of glass with respect to air, then the angle between reflected and refracted rays is

A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of 45 degree. 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:

Light from a luminious point on the lower face of a rectangular glass slab , 2 cm thick, strikes the upper face and the totally reflected rays outline a circle of 3.2 cm radius on the lower face. Find the refractive index of the glass.

A ray of light travelling in impure water is incident on a glass plate immersed in it. Wher the angle of incidence is 51^(@) , the reflected ray i totally plane polarised. Given that refractiv index of impure water is 1.4. The refractive index of glass should be ......

For right-angled prism, ray-1 is the incident ri and ray-2 is the emergent ray as shown in the figure. Refractive index of the prism is .........

At what angle should a ray of light be incident on the face of a prism of refracting angle 60^(@) so that it just suffers total internal reflection at the other face? The refractive index of the material of the prism is 1.524.

A glass wedge with a small angle of refraction theta is placed at a certain distance from a converging lens with a focal length f ,one surface of the wedge being perpendicular to the optical axis of the lens. A point sources S of light is on the other side of the lens at its focus. The rays reflected from the wedge (not from base) produce, after refraction in the lens , two images of the source displaced with respect to each other by d. Find the refractive index of the wedge glass. [Consider only paraxial rays.]