Given noticeable points, about the amplitude of resultant waves of two harmonic progressive waves on stretached string.

Given noticeable points, about the amplitude of resultant waves of two

1.	Given noticeable points, about the amplitude of resultant waves of two harmonic progressive waves on stretached string.
Answer» Solution :The amplitude of RESULTANT wave is a function of phase difference `phi` between TWO element waves. `A (phi) =2 a cos "" (phi)/(2)` When two waves have same phase, then `phi =0 ` HENCE,` y (x,t) =2a sin (KX - omega t )` Relultant amplitude is `A = 2a. `It is maximum amplitude. If `phi =PI` the two waves are completely out of phase, the amplitude of the resultant wave reduces to zero. `therefore (x ,t)= 0 [because A (phi) = 2 cos "" (phi)/(2) = 2 a cos "" (pi)/(2) =0]`