Inch Mirror
Inch Mirror
how to find surface area of a concave mirror?
whts the formula of surface area of concave mirror. please calculate for a 9 inch diameter mirror , 12 inch and an 18 inch?
The surface area depends on the concavity of the mirror.
If it is flat, then the formula for the area of a circle is used.
That is area = pi*r^2 = pi*4.5^2=pi*20.25=63.6 sq. in.,
but the greater the concavity, the greater the surface area.
FRESNEL LENS with a Mirror Array 20 inch SUPER FOCAL POINT
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