The part of the lens through which the ray of light passes without suffering deviation is called _________.

Name the part of a lens through which a ray of light passes without suffering any deviation.

The deviation of a ray of light is called _________ .

The point on the principal axis of a lens such that a ray of light passing through it, emerges undeviated

The point on the principal axis of a lens such that a ray of light passing through it, emerges undeviated

In which case does a light ray pass through the centre of a thin lens without deviation?

The rays of light travelling through the optical centre of a lens pass without changing their path. Is it true? justify