Question

Two travelling waves y1(x,t) = A sin⁡[k(x-vt)] and y2(x,t) = A sin[k(x+vt)] are superimposed on the same string. The distance between two adjacent nodes is:

Answer 1

$y=y_1+y_2=2A\cos(vt)\sin(kx),$

$d=\frac{\pi}k.$