Q. Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams
A)
B)
C)
D)
Explanation
(c) The dispersion produced by a spherical surface depends on it’s radius of curvature. Hence, a lens will not exhibit dispersion only if it’s two surfaces have equal radii, with one being convex and the other concave
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.