[" When two waves with same "],[" frequency and constant phase "],[" difference interfere,"]

When two waves with same frequency and constant phase differenc interfere,

What happens when a sound wave interfers with another wave of same frequency and constant phase difference?

When two waves of the same amplitude and frequency but having a phase difference of phi , travelling with the same speed in the same direction (positive x), interfere, then

When two waves of the same amplitude and frequency but having a phase difference of phi , travelling with the same speed in the same direction (positive x), interfere, then

When two waves of the same frequency and same amplitude ‘a’ are superposed in phase, the resulting intensity at the point of superposition is proportional to