1. The problem statement, all variables and given/known data The wave function of a particle in a stationary state with an energy Eo at time t=0 is Ïˆ(x).after how much minimum time the wave function will be Ïˆ(x) again. 2. Relevant equations 3. The attempt at a solution Ïˆ(x, t)=Ï†(x)e^(-iEot/h).intuitively i think the answer should be Eot/h=2Ï€. So t=2Ï€h/Eo.But I am looking for a more rigid analytical method.please help.