An under-water swimmer cannot see very clearly even in absolutely clear water because of

Fish are able to see under water because

Fish are able to see under water because

Fish are able to see under water because

The heartwood cannot conduct water because of

The heartwood cannot conduct water because of

An under water swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance from the surface of water equal to (Refractive Index of water is 4/3)