A disc is placed on a surface of pond which has refractive index `3/5` . A source of light is placed 4 m below the surface of liquid. The minimum radius of disc will be so light is not coming out

A disc is placed on the surface of pond filled with liquid of refractive index (5)/(3) . A source of light is placed 4m below the surface of liquid. Calculate the minimum area of the disc so that light does not come out of liquid.

A disc is placed on the surface of pond filled with liquid of refractive index (5)/(3) . A source of light is placed 4m below the surface of liquid. Calculate the minimum area of the disc so that light does not come out of liquid.

The water in a pond has a refractive index (5)/(3) . A source of light is placed 4 m below the surface of water. Calculate the minimum radius of an opaque disc needed to be floated on water so that light does not come out.

In a tank filled with a liquid of refractive index 5//3 , a point source of light is placed 2 m below the surface of water. To cut off all light coming out of water from the source, what should be the minimum diameter of a disc, which should be placed over the source on the surface of water ?

A point source of light is placed 4m below the surface of a liquid of refractive index 5//3 . The minimum diameter of a disc, which should be placed over the source, on the surface of the liquid to cut off all light out of water, is

A point source of light is placed 4 m below the surface of water of refractive index 5//3 . The minimum diameter of a disc, which should be placed over the source, on the surface of water to cut-off all light coming out of water is

A point source of light is placed 4 cm below the surface of water of refractive index 5/3. The minimum diameter of a disc which should be placed over the source, on the surface of water to cut - off all light coming out of water is