Question

There is a small source of light at some depth below the surface of water (refractive index ) in a tank of large cross sectional surface area. Neglecting any reflection from the bottom and the absorption by water, percentage of light that emerges out of surface is (nearly):
[Use the fact that surface area of a spherical cap of height and radius of curvature is ]  

A

B

C

D

Medium
JEE Mains

Solution

verified
Verified by Toppr
Correct option is C)

here angle is

 
 
We know
Solid angle,
Percentage of light
                                 
                                 

solution
expand
Solve any question of Ray Optics and Optical Instrument with:-

Was this answer helpful?

upvote 0
downvote0

Similar questionsstar-struck