1.

Why centre of the curvature of lens is equal to two times of principal focus?(C=2F)??

Answer» It lies between centre of curvature and pole.
Sabka yahi mtlb hai bhai....
refer byjus videos!!!!
MOST ACCURATE ANSWER IS HERE!!!!A CONCAVE MIRROR HAS 2F = C JUST AS AN APPOPROXIMATION. ONLY PARABOLIC MIRRORS ONLY 2F = CSO REALLY FOR CONCAVE MIRROR 2F =/ C
Yeah it\'s taken on the basis of observation
Probably after many experiments , it would be taken as formula.!
It had been found after observing many lenses and mirrors.


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