A point source of light is submerged 28 mbelow the surface


A point source of light is submerged 2.8 mbelow the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the areailluminated is a circle. What is the maximum radius that this circle could have?

m

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Physics: A point source of light is submerged 28 mbelow the surface
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