Home
Class 12
PHYSICS
A point source of light is kept below th...

A point source of light is kept below the surface of water `(n_(w) = (4)/(3))` at a depth of `sqrt7` m . The radius of the circular bright patch of light noticed on the surface of water is …… m .

A

3

B

`sqrt7/3`

C

`sqrt7`

D

`3/sqrt7`.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A bulb is kept at a depth h inside water of refractive index x . Area of bright patch on water surface is

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

The lower end of a capillary tube of diameter 2.00mm is dipped 8.00cm below the surface of water in a beaker. What is the pressure required in the tube in order to blow a hemispherical bubble at its end in water? The surface tension of water at temperature of the experiments is 7.30 times 10^2 Nm^-1 .1 atmospheric pressure =1.01 times 10^5 Pa density of water =1000 kg//m^3,g=9.80 ms^-2 . Also calculate the excess pressure.

A small bulb is placed at the bottom of a tank containing water to a depth of 80cm. What is the area of the surface of water through which light from the bulb can emerge out? Refractive index of water is 1.33. (Consider the bulb to be a point source.)

A solid consisting of a right circular cone standing on a hemisphere , is placed upright in a right circular cylinder full of water and touching the bottom. Find the volume of water left in the cylinder , given that the radius of the cylinder is 3 cm and its height is 6 cm The radius of the hemisphere is 2 cm and the height of the cone is 4 cm . (Take pi =(22)/(7) ).