Question

The floor of a water tank appears at a depth 2.5m iftherefractiveindexof water is 1.33 findthe actualdepth of water

Answer 1

The ratio of Real depth(Dr) to Apparent depth(Da) is equal to the refractive index of medium η .

{ η=Dr/Da }

Let the real depth be X .

⇒ 1.33 = x/2.5

⇒ x = 1.33*2.5

∴ X = 3.325 m