Homework Statement
What fraction of a beam of 8 eV electrons is reflected by a potential step up of height 6 eV? What fraction is reflected from a step down of 6eV?
Homework Equations
R=(\frac{k_{1}-k_{2}}{k_{1}+k_{2}})^{2}
Exchange k_{1} and k_{2} for the step down potential...
Homework Statement
Find the Fourier series expansion for f(x)=x^{3}, a periodic function on -\pi<x<\pi
Use this to compute \zeta(6)=\sum\frac{1}{n^{6}}Homework Equations
Parsevals Theorom,
Real Fourier series
The Attempt at a Solution
I got the Fourier series to be...