Q. Figure shows a glowing mercury tube. The illuminances at point $A,\ B$ and $C$ are related as
A) $B > C > A$
B) $A > C > B$
C) $B = C > A$
D) $B = C < A$
Explanation
(d) By the symmetry of the rays and location of the points
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.