Mathematics, 07.09.2020 08:01 harodkdc7910

thr reflector of a flashlight is in the shape of a parabolic surface. the reflections of all rays from the light bulb to any point on the parabolic surface will all be parallel to each other. the casting has a diameter of 16 centimeters and a depth of 8 centimeters. how far from the vertex should the light bulb be placed?

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thr reflector of a flashlight is in the shape of a parabolic surface. the reflections of all rays fr...

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