Q. Two adjacent piano keys are struck simultaneously. The notes emitted by them have frequencies $n_{1}$ and $n_{2}.$ The number of beats heard per second is
A) $\frac{1}{2}(n_{1} - n_{2})$
B) $\frac{1}{2}(n_{1} + n_{2})$
C) $n_{1}\sim n_{2}$
D) $2(n_{1} - n_{2})$
Explanation
The correct answer is Option C: $n_{1}\sim n_{2}$.
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.