Science, asked by erni9267, 1 year ago

Can focus of a concave mirror be negative

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Answered by Vinu4141

0

In other words, the focal length of a concave mirror, with a realfocus, is always positive, and the focal length of a convex mirror, with a virtual focus, is alwaysnegative. ... If the light-rays do not actually cross, but appear to cross when projected backwards behind the mirror, then the image is virtual.

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