A point source is placed at a depth `h` below the surface of water (refractive index `= mu`). The medium above the surface of water is air from water.

A point source is placed at a depth h below the surface of water (refractive index = mu ). The medium above the surface area of water is air from water.

A point source is placed at a depth h below the surface of water (refractive index = mu). (a) Show that light escapes through a circular area on the water surface with its centre directly above the point source. (b) Find the angle subtended by a radius of the area on the source.

A point source is placed at a depth h below the surface of water (refractive index = mu). (a) Show that light escapes through a circular area on the water surface with its centre directly above the point source. (b) Find the angle subtended by a radius of the area on the source.

A point source is placed at a depth h below the surface of water (refractive index = mu). (a) Show that light escapes through a circular area on the water surface with its centre directly above the point source. (b) Find the angle subtended by a radius of the area on the source.

A point source of light is placed at a depth of h below the surface of water of refractive index mu . A floating opaque disc is placed on the surface of water so that light from the source is not visible from the surface. The minimum diameter of the disc is

A point source of light is placed at a depth of h below the surface of water of refractive index mu . A floating opaque disc is placed on the surface of water so that light from the source is not visible from the surface. The minimum diameter of the disc 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 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 soujrce 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 alol light coming out of water is