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Problem
Problem
A pile 4 m high driven into the bottom of a lake is 1 m above the water. Determine the length of the shadow of the pile on the bottom of the lake if the sun rays make an angle of
45
∘
45^\circ
4
5
∘
with the water surface. The refractive index of water is
4
/
3
4/3
4/3
.
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