Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 32 - Ray Optics > 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 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 4m below the surface of a liquid of refractive index 5/3. The minimum diameter of a disc is on the surface of the liquid to cut off all light out of water which should be placed over the source