Asked by Anonymous
The focus of a parabolic mirror is at a distance of 8cm from the center the mirror is 25cm deep find the diameter of the mirror.
Answers
Answered by
Steve
x^2 = 4py, so
x^2 = 32y
at y=25, x^2 = 800, so x = 20√2 = 28.28
That's the radius, so the diameter is 56.56 cm
x^2 = 32y
at y=25, x^2 = 800, so x = 20√2 = 28.28
That's the radius, so the diameter is 56.56 cm
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