1. The problem statement, all variables and given/known data In the case of an electron wave packet, the function A(k) has a rectangular shape, i.e. it is equal to A0 if k0-a<k<k0+a, and zero everywhere else. (a) Find the minimal uncertainty of electron position. (b) Find the electron wavefunction. 2. Relevant equations ΔxΔp=h/4pi (for min uncertainty) ΔxΔκ=1/4pi ψ=Asin2pi(κx-vt) 3. The attempt at a solution a) κ=1/λ ΔxΔκ=ΔxΔ(1/λ)=1/4pi Δx=1/(4pi(Δ(1/λ))= 1/(4pi(Δ(k/2pi)) Because k0+a -(k0-a)=2a, the span of k is 2a? Δx=2pi/(4pi*2a)=1/2a I am not sure if I am doing this correctly. My lecture notes talk about k and λ space, making no mention of κ, but my book uses equations with kappa. It seems like κ=k/2pi, but maybe I have that wrong. b)ψ=Asin2pi(κx-vt) Not sure where to go from here I appreciate any help I can get!