After all the spectrum is nothing, but the representation of that, I will draw another
picture of that. Now, here I have got basically this is my wave, this is my response, this
also looks like that, this also must be can be written down like a spectrum, because any
irregular waves response can be broken down to spectrum, this is a responsive spectrum I
can call, this is omega and this may be response, I can call it R omega something like
that