MOST ACCURATE ANSWER IS HERE!!!! A CONCAVE MIRROR HAS 2F = C JUST AS AN APPOPROXIMATION. ONLY PARABOLIC MIRRORS ONLY 2F = C SO REALLY FOR CONCAVE MIRROR 2F =/ C

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Pk . 6 years ago

Yeah it's taken on the basis of observation

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Shreya_ S❤️ 6 years ago

Probably after many experiments , it would be taken as formula.!

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Shreya_ S❤️ 6 years ago

It had been found after observing many lenses and mirrors.

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