Question

Light ray passing through optical centre remains undeviated. WHY?

Answer 1

Answer:

this can be observed in the thick lens. in thin lense the perpendicular distance between extended incident ray and extended emergent ray is negligible. so we can say that light rays passes through optical centre without deviation

Answer 2

Answer:

1. The portion of a lens near the optical centre is like a very thin slab of glass.

2. Hence, light ray passing through the optical centre remains undeviated.

Explanation:

Optical Centre :

1. The point inside a lens on the principle axis, through which light rays pass without changing their path is called the optical centre of a lens.

2. It is denoted by O.