what is mean by focal point?

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1. Answer:

   sorry, mai message nhi kr skta same reason

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   fahad khan

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2. Answer:

   Also called principal focus. Optics. either of two points on the axis of a mirror, lens, or other optical system, one point being such that rays diverging from it are deviated parallel to the axis upon refraction or reflection by the system and the other point being such that rays parallel to the axis of the system converge to the point upon refraction or reflection by the system.

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