A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.)
A) 50
B) 60
C) 40
D) 70
E) 110

Question

Quizplus · Accepted Answer

The apparent depth of an object in water is given by the formula:

apparent depth = real depth / refractive index of water

In this case, the real depth is 80 cm and the refractive index of water is 1.33. So, the apparent depth is:

apparent depth = 80 cm / 1.33 = 60 cm

Therefore, the answer is Choice B, 60.

A Fish Is 80 Cm Below the Surface of a Pond