A ball is dropped from a height of 20 m above the surface of water in a lake. The…
Physics · NEET · NTA Exams — Optics
A ball is dropped from a height of 20 m above the surface of water in a lake. The refractive index of water is \(\frac{4}{3}\). 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 / s2]
- 9 m/s
- 12 m/s
- 16 m/s
- 21.33 m/s
Answer
(C) 16 m/s
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