Q. The two lenses of an achromatic doublet should have
A) Equal powers
B) Equal dispersive powers
C) Equal ratio of their power and dispersive power
D) Sum of the product of their powers and dispersive power equal to zero
Explanation
(d) The two lenses of an achromatic doublet should have, sum of the product of their powers and dispersive power equal to zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.