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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.
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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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