Answer to Question #269231 in Optics for NICKO

Question

A person is lying on a diving board 3.00 m above the surface of the water in a swimming pool. She looks at a penny that is on the bottom of the pool directly below her. To her, the penny appears to be a distance of 7.00 m from her. What is the depth of the water at this point?

Answer 1

Distance that is below water (as seen by diver) = $7.00-3.00=4.00m$

Apparent depth = 4.0m

$Apparent depth = \frac {Real depth} {Refractive index}$

So real depth = $4.0×1.33 = 5.32$

So depth of water = 5.32m