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The surfaces of the sun glass …

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The surfaces of the sun glass are curved ,yet their power may be zero ...Why??

Posted by Mohit Sepat 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Srivinayak V 7 years, 3 months ago

A sunglass is made up of two glasses ie ,one convex and a concave lens of same radius of curvature and same focal length. So they posses same power in two structures. Power of concave lens = -xD Power of convex lens = -xD. Therefore power of combination of lens = 0

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