Question

With the help of a suitable diagram, explain the meaning of terms
a) centres of narrature (b) optical centre (c) focus​

Answer 1

Answer:

Centre of Curvature : the centre of a circle which passes through a curve at a given point and has the same tangent and curvature at that point.

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

Principal Focus : a point where light rays originating from a point on the object converge.