A coin is dropped to the bottom of the pool (n=1.33 for water) at a point where

Question

A coin is dropped to the bottom of the pool (n=1.33 for water) at a point where the depth is 1.30 m. How far from the surface does the coin appear to be when viewed from the air (n=1.00) directly above? A coin is dropped to the bottom of the pool (n=1.33 for water) at a point where the depth is 1.30 m. How far from the surface does the coin appear to be when viewed from the air (n=1.00) directly above? A coin is dropped to the bottom of the pool (n=1.33 for water) at a point where the depth is 1.30 m. How far from the surface does the coin appear to be when viewed from the air (n=1.00) directly above?

Explanation / Answer

Apparent depth = real depth / refractive index

Apparent depth = 1.30 m / 1.33 = 0.98 m

The coin appear to be at 0.98 m from top.

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