A ray of light passing through the optical centre of a lens do not deviate. Why?
Answers
The middle part of the lens will just act as a rectangular glass slab. We may verify it by cutting the lens horizontally. Now we know that rectangular glass slab refract light in such a way that emergent is parallel to incident. Actually the same happens when the ray passes through optical centre. This can be observed in a thick lens. In thin lenses the perpendicular distance between extended incident ray and extended emergent ray is negligible. So we can say that light ray passes through optical centre without deviation.
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Adarsh...
Answer:
1. The portion of a lens near the optical centre is like a very thin slab of glass.
2. Hence, the rays of light passing through the optical centre of a lens do not deviate.
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.