Question: The filament of a light bulb is a thin wire that glows when electricity passes through it. The filament of a car headlight is at

The filament of a light bulb is a thin wire that glows when electricity passes through it. The filament of a car headlight is at the focus of a parabolic reflector, which sends light out in a straight beam. Given that the filament is 1.5 inches from the vertex, find an equation for the cross section of the reflector. The reflector is 7 inches wide. How deep is it?

7 in. 1.5 in.

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