Q.Which of the following aberrations will NOT occur for spherical mirrors? (A) Chromatic aberration (B) Coma (C) Distortion (D) Spherical aberration

[!TLDR] Chromatic aberration needs colour-dependent refraction (dispersion); a mirror only reflects, so it never disperses colour and never s …

Coma, distortion and spherical aberration all arise from the geometry of reflection at a spherical (rather than parabolic) surface, or from rays inclined to the axis, and so occur for spherical mirrors just as they do for lenses. Chromatic aberration, however, arises specifically because a material's REFRACTIVE INDEX (and hence the amount it bends light) differs by colour -- it is fundamentally a refraction-based defect. Since a mirror image forms purely by REFLECTION, which involves no refract …

Distinguish aberrations that arise from the mirror's spherical/off-axis geometry (which do occur for mirrors) from chromatic aberration, which specifically require …

Assuming any 'aberration' concept from lenses automatically also applies to mirrors, without checking whether it is caused by reflection geometry (a …