Recent content by yoq_bise

Hi all, In all books I looked it is written that energy carried by a wave is proportional to its amplitudes square i.e. E\proptoA2, if wave equation is f(x)=Asin(wx) but what is the exact equation? Also if we define the wave with Fourier series f(x)=\sumAcos(nx)+Bcos(nx) what...

Yes I looked in Hassani, Arfken and Diprima but I couldn't find Can anyone suggest other books or web sites?

Hi all, I couldn't find any proof of the following statement: The Fourier series expansion of f(x), which has a discontinuity at y, takes on the mean of the left and right limits i.e. f(y)= (1/2)(f(y+)+f(y-)) is there anyone who can help me? Thanks