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100W LED Long Distance Light LED Searchlight Super Bright LED Spotlight
A spotlight on a boat is 2.5 m above the water, and the light strikes the water at a point that is 8.0 m horizontally displaced from the spotlight (see the figure).
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100W LED Long Distance Light LED Searchlight Super Bright LED Spotlight
A coin lies on the bottom of a lake 2m deep at a horizontal distance x
A spot on a boat is 2.5 m above the water, and the light strikes the water at a point that is 8.0 m horizontally displaced from the spotlight. The depth of
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