Science, asked by ishuishu580, 7 months ago

what is the principal focus of a sperical mirror?

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Answered by Anonymous

Answer:

A principal focus or focal point is a special focus: For a lens, or a spherical or parabolic mirror, it is a point onto which collimated light parallel to the axis is focused. Since light can pass through a lens in either direction, a lens has two focal points one on each side.

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