A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? [Refractive Index of Water = 4/3]
- 8.0m
- 5.5m
- 5.0m
-
4.5m
The correct answer is: D
Explanation
Refractive Index = Real Depth/App. Depth4/3 = 6/app. depth
App Depth = (3 x 6)/4 = 4.5m
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