Q. What cause chromatic aberration?
A) Non-paraxial rays
B) Paraxial rays
C) Variation of focal length with colour
D) Difference in radii of curvature of the bounding surface of the lens
Explanation
(c) In chromatic aberration the image formed by a lens has coloured fringes, because the refractive index for different colours is different and hence the focal length of lens for different colours is different. So, the cause of chromatic aberration is the variation of focal length with colour.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.