1. The problem statement, all variables and given/known data Suppose the wave function for a particle of mass m in one dimension is psi(x)= (const)ex2/4l2 express this wave function in terms of a fourier series or integral. I know that psi(x)=[itex]\sum[/itex]k (ak *eikx) for a plane wave. I have no idea where to go from here. Any help is appreciated. I don't even know what the L in the wave function represents. Psi(x) should look like a gaussian curve.