When two waves of almost equal frequencies `n_(1)` and`n_(2)` reach at a point simultaneously, what is the time interval between successiv maxima ?

Explanation

When two waves of almost equal frequencies `n_(1)` and `n_(2)` reach at a point simultaneously, beats are produced.
No. of beats `//` sec `=(n_(1)-n_(2))`
Time interval between two successive beats `=` time interval between two successive maxima
`=(1)/((n_(1)-n_(2)))`