A tank contains water to a depth of and its surface is covered by a plane glass plate…
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
A tank contains water to a depth of 6cm and its surface is covered by a plane glass plate 1cm thick. The refractive indices of water and glass are 1.33 and 1.5 respectively. For an observer looking normally from air, what is the apparent depth of the object at the tank bottom measured from the top surface of the glass?
(a) 4.75cm
(b) 5.18cm
(c) 4.51cm
(d) 5.51cm