Q. The dispersive power of the material of lens of focal length $20\ cm$ is 0.08. The longitudinal chromatic aberration of the lens is
A) $0.08\ cm$
B) $0.08/20\ cm$
C) $1.6\ cm$
D) $0.16\ cm$
Explanation
(c) Longitudinal chromatic aberration
$= \omega f = 0.08 \times 20 = 1.6cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.