Question

Definition of optical centre of a lens?

Answer 1

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

Here is your answer...

Optical center of the lens is defined as the point which lies on the principal axis through the rays of light passes without any deflection.