The surface of sunglasses is curved, yet their power is zero. Why?
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The focal length F of a lens is given by In a sun glass both surfaces are curved, but their radii of curvature r.\ and r2 are equal. Hence, the power is zero.
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hay!!
the facial length f of a lens is given by in a sun glasses both surface
r1 and r2 is equal
so hence proved power is zero
I hope it's help you
the facial length f of a lens is given by in a sun glasses both surface
r1 and r2 is equal
so hence proved power is zero
I hope it's help you
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