0 A ball is dropped from a height of 20 m above the surface

Last updated: 6/12/2023

0 A ball is dropped from a height of 20 m above the surface of water in a lake The refractive index of water is 4 3 A fish inside the lake in the line of fall of the ball is looking at the ball At an instant when the ball is 12 8 m above the water surface the fish sees the speed of ball as Take g 10 m s 1 a 9 m s b 12 m s s 1 d 20 m s c 16 m s 1