Q. When light rays from the sun fall on a convex lens along a direction parallel to its axis
A) Focal length for all colours is the same
B) Focal length for violet colour is the shortest
C) Focal length for yellow colour is the longest
D) Focal length red colour is the shortest
Explanation
(b) Focal length for violet colour is minimum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.