Q. Two periodic waves of intensities I₁ and I₂ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is
A) 2(I₁ + I₂)
B) I₁ + I₂
C) (√I₁ + √I₂)²
D) (√I₁ − √I₂)²
Explanation
[Solution from source] On superposition, Imax = (√I₁ + √I₂)² and Imin = (√I₁ − √I₂)². Adding them, the cross terms ±2√(I₁I₂) cancel, leaving 2(I₁ + I₂). (√I₁ + √I₂)² is only the maximum, not the sum. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.