Question

swimmer is treading in water (with her head above the water by right angle) at the surface of the pool 3 m deep . she sees a coin on the bottom directly below . How deep does the coin appear to be

Answer 1

When the swimmer is looking at the coin directly below her at a right angle, the apparent depth of the coin will of the pool, which is 3 meters deep. This is because light travels in a straight line through the water perpendicular to the surface, so there is Thus, the coin will appear to be at a depth of 3 meters.