Question

vi) explain spherical aberration for spherical mirrors how can it be minimised? can it be eliminated by some curved mirrors?​

Answer 1

Explanation:

Spherical aberration. The curved surface of a lens is most often spherical (this shape is easy to make). When light refracts through a lens with a spherical surface, the rays that pass through the outer diameters of the lens will focus at a different point from rays that pass through the center.

Answer 2

Answer:Spherical aberration can be eliminated by making lenses with an aspheric surface. Descartes showed that lenses whose surfaces are well-chosen Cartesian ovals (revolved around the central symmetry axis) can perfectly image light from a point on the axis or from infinity in the direction of the axis.