A point source of light is 80.0 cm below the surface of a body of water, find

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A point source of light is 80.0 cm below the surface of a body of water, find the diameter of the circle at the surface through which light emerges from the water.

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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