MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Instantaneous Force and Impulse

A point sourc...

Question

A point source of light is placed at the centre of curvature of a hemispherical surface. The radius of curvature is r and the inner surface is completely reflecting. Find the force on the hemisphere due to the light falling on it if the source emits a power W.

Open in App

Solution

As the power of source is P
As the speed of the light is c
Let the force on the hemisphere be F
Equating the power delivered,
$F c = p$
$F = \frac{P}{c}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Light from a point source in the air falls on a spherical glass surface (

μ = 1.5

and radius of curvature

20 c m

). The distance of the light source from the glass surface is

100 c m

. The position where the image is formed is :

Q. From a point source a light falls on a spherical glass surface

(μ = 1.5 a n d r a d i u s o f c u r v a t u r e = 10 c m)

. The distance between point source and glass surface is 50 cm . The position of image is

Q. From a point source a light falls on a spherical glass surface (

μ = 1.5

and radius of curvature =

10 c m

). The distance between the point source and glass surface is

50 c m

. The position of the image is :

Q. Light from a point source in air falls on a convex spherical glass surface ( refractive index = 1.5, radius of curvature = 20 cm). The distance of light source from the glass surface is 100 cm. At what position is the image formed ?

Q. Light from a point source in air falls on a convex spherical glass surface of refractive index

1.5

and radius of curvature

80

cm. The distance of light source from the glass surface is

100

cm. At what position is the image formed?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Summary and Misconceptions

PHYSICS

Watch in App

explore_more_icon

Explore more

Instantaneous Force and Impulse

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon