A fish looks up toward the surface of a pond and sees the entire panorama of clouds,

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A fish looks up toward the surface of a pond and sees the entire panorama of clouds, sky, birds, and so on, contained in a narrow cone of light, beyond which there is darkness. What is going on here to produce this vision, and how large is the opening angle of the cone of light received by the fish? 

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Inquiry into Physics

ISBN: 978-1305959422

8th edition

Authors: Vern J. Ostdiek, Donald J. Bord

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