The figure shows an observer standing at height of 2 m near a pool. When the pool i empty, he cannot see the bottom. What the minimum height h of the water for the observer to see the bottom?

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The figure shows an observer standing at a
height of 2 m near a pool. When the pool is
empty, he cannot see the bottom. What is
the minimum height h of the water for the
observer to see the bottom?
2 m
4 m
3 m
-4m- →
Transcribed Image Text:The figure shows an observer standing at a height of 2 m near a pool. When the pool is empty, he cannot see the bottom. What is the minimum height h of the water for the observer to see the bottom? 2 m 4 m 3 m -4m- →
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