Q. The time of reverberation of a room A is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double of those of room A ?
A) 2
B) 4
C) 1/2
D) 8
Explanation
[Solution from source] Sabine's formula gives reverberation time T ∝ V/(aS), volume over absorbing surface area. Doubling every dimension makes V eight times and S four times, so T doubles to 2 s. Scaling with volume alone would wrongly give 8 s. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.