Chromatic aberration of a lens can be corrected by

When a beam of white light is allowed to pass through a convex lens parallel to the principal axis,the different colours of light converge at different points on the principal axis after refraction. This is called:

To remove the chromatic aberration,the combination of lenses should be such that

The chromatic aberration in lenses occurs due to

What condition must be satisfied by a combination of lenses to eliminate chromatic aberration?

The rays of different colours fail to converge at a point after passing through a thick converging lens. This defect is called