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.

Answer 1

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.