I have got broken down. So, I could have plotted number on omega, what is this? xi n; xi n; I could have plotted that, but that that would be called frequency distributions of amplitudes, but people are not plotting that. what I could have plotted square of that. Instead of that I am plotting here, this side is the term proportional to half of xi a square divided by delta omega, because why I say is that, this plot, this plot will represent such that it will basically represent the area under the curve between certain frequency band to be the energy of all the waves of that frequency band.