Three sound waves of equal amplitude have frequencies (n-1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be ?

Three sound waves of equal amplitude have frequencies (n-1), n, (n + 1

1.	Three sound waves of equal amplitude have frequencies (n-1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be ?
Answer» 3 2 1 4 Solution :Maximum no. of beats per UNIT TIME, `= f _(MAX) -f _(MIN)` `= (n +1) --(n-1)=2`