Q. An achromatic combination of lenses is formed by joining
A) 2 convex lenses
B) 2 concave lenses
C) 1 convex lens and 1 concave lens
D) Convex lens and plane mirror
Explanation
(c) For an achromatic combination $\frac{\omega_{1}}{f_{1}} + \frac{\omega_{2}}{f_{2}} = 0$
$i.e.,$ 1 convex lens and 1 concave lens
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.