Question

what do you understand by optical centre of lens​

Answer 1

HEY MATE HERE IS YOUR ANSWER

 a point on the axis of a lens that is so located that any ray of light passing through it in passing through the lens suffers no net deviation and that may be within, without, or on either surface of the lens

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Answer 2

Answer:

a point on the axis of lens that is so located that any day of light passing through it in passing through the lens suffers no net deviation and that may be within without, or on either surface of the lens.