Afish 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? how large (in degrees) is the opening angle of the cone of light received by the fish?
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Afish looks up toward the surface of a pond and sees the entire panorama of clouds, sky, birds, and...
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