Question

in a lake ,a fish rising vertically to the surface of water uniformly at th rate of 3 m/s ,observe a bird diving vertically towards the water at a rate of 9 m/s vertically above it .calculate actual velocity of the dive of the bird.

Answer 1

 Velocity of bird with respect to stationary fish in water = 6m/s

 So actual vel of bird = 6/refractive index of water =6/1.3=4.5

 

Answer 2

Explanation:

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