Q. Inverse square law for illuminance is valid for
A) Isotropic point source
B) Cylindrical source
C) Search light
D) All type of sources
Explanation
The correct answer is Option A: Isotropic point source.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.