Q. A fish, in the pond is at a depth of from water surface and is moving vertically upwards with velocity . At the same instant a bird is at a height of from water surface and is moving downwards with velocity . At this instant both are on the same vertical line as shown in Fig. Which of the following statements is/are correct?

Solution:

(a) For the fish, the bird appears at a height of from water surface
(b) For the bird, the fish appears at a depth of below water surface
Hence the bird sees the fish away while the fish sees the bird away