Two sitar strings vibrate simultaneously at and

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

Two sitar strings vibrate simultaneously at

420\,\text{Hz}

and

426\,\text{Hz}

. (a) How many beats will a listener hear in

15\,\text{s}

? (b) What is the time interval between a maximum and the very next minimum in the beat pattern?