A parabolic mirror to be used in a searchlight measures 40 centimeters tall and 80 centimeters wide. It's light bulb needs to be

Question

A parabolic mirror to be used in a searchlight measures 40 centimeters tall and 80 centimeters wide. It's light bulb needs to be placed at the focus for the light to magnify properly. Find the distance from the vertex to the bulb. Hint: Assume the parabola opens downward and has its vertex at the origin.

Kunduz · Accepted Answer

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