Physics, asked by simadutta1113, 9 months ago

Define principal focus of concave lens

Answers

Answered by Anonymous

5

It is a point on the principal axis of a concave lens , from where a parallel beam of light rays, travelling parallel to principal axis ,after passing through the lens appears to come.

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Answered by yogininikam2006

0

Answer:

it is a point on its principal axis to which all light rays which are parallel and close to axis converge after reflection from the mirror.

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