5.A coin is resting on the bottom of a water pool (nwater = 1.33) 1.00m deep. On top of the water floats a layer of benzene (nbenzene = 1.50). which is 20.0cm thick. Looking down perpendicularly, how far beneath the topmost surface does the coin appear. Since the angle of incidence is zero, can I assume that the distance between the topmost surface with the coin = 120cm?