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Question
The rays of different colours fail to converge at a point after going through a converging lens. This defect is called
Options
spherical aberration
distortion
coma
chromatic aberration.
Solution
chromatic aberration
When light rays of different colours do not converge at the same point after passing through a converging lens, it is called chromatic aberration. This happens because a lens has different refractive indices for different colours, i.e, for different wavelengths of light.
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