Question

A person is swimming 0.87 m beneath the surface of the water in a swimming pool. A child standing on the diving board drops a ball into the pool directly above the swimmer. The swimmer sees the ball dropped from a height of 5.3 m above the water.

Part A

From what height was the ball actually dropped?  

Answer 1

apparent depth = actual depth ( n_observer / n_object)

n_observer = 1.33

m_object = 1

apparent distance = 5.3 m

5.3 = d (1.333 / 1)

d = 3.98 m