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A = (s, y)
1. Derive the equation for the mirror surface such that light incident on the
left, from a source at infinity, will be focused at F. The equation should be
written only in terms of s, y and f (the curve will map out points like A with
coordinates s and y). You do not need to simplify the equation.
Cy
incident ray
f=rt8
S=2¢? =7 2rt28
A-(s
n2f =nr top
scor
sftJpetyz
1

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