Calculate the ratio of intensity of wave train A to wave train B.

The ratio of intensity of wave and energy density gives

Displacement - time graphs for two waves, wave - 1 and wave - 2 are shown here. The ratio of the intensity of wave-1 to that of wave - 2 is

Displacement - time graphs for two waves, wave - 1 and wave - 2 are shown here. The ratio of the intensity of wave-1 to that of wave - 2 is

Two waves of intensity ration 1 : 9 cross eachother at a point. Calculate the ratio of resultant intensities at a point, when (a) waves are incoherent (b) waves are coherent and differ in phase by 60^(@) .