1. A flint glass plate ( n = 1.66) rests on the bottom of an aquarium tank. The

Question

1. A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. The plate is 8.50 cm thick (vertical dimension) and covered with water (n = 1.33) to a depth of 12.5 cm. Calculate the apparent thickness of the plate as viewed from above the water. (Assume nearly normal incidence of light rays.)
= ______ cm

2. A goldfish is swimming inside a spherical bowl of water having an index of refraction n = 1.333. Suppose the goldfish is p = 10.5 cm from the wall of a bowl of radius |R| = 19.8 cm, as in the figure below. Neglecting the refraction of light caused by the wall of the bowl, determine the apparent distance of the goldfish from the wall according to an observer outside the bowl.
= ________ cm behind the glass

Explanation / Answer

1)For near normal incidence .. Refractive index n = real depth / apparent depth

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