1. The problem statement, all variables and given/known data A system has 2 possible energy values E0 and 2E0. At a certain instant it is in a state in which the expectation value of the energy is 3/2 E0.Calculate the wave function in this state given that Ïˆ0 , Ïˆ1;are the wavefuntion corresponding to two possible stationary states.What is the wave function after a time t has elapsed? 2. Relevant equations 3. The attempt at a solution <E>=âˆ« Ïˆ*ÏˆdÏ„=âˆ«(c0Ïˆ0 + c1Ïˆ1)*ÃŠ(c0Ïˆ0 + c1Ïˆ1)dÏ„ <E>=c02E0 + 2c12E0=3/2E0 Co^2 + 2C1^2=3/2. Co=âˆš2/3 and C1 =âˆš4/3.so Ïˆ =âˆš2/3ÏˆÎ¿ +âˆš4/3 Ïˆ1. But in the text book given answer is 1/âˆš2 (Î¨Î¿ + Ïˆ1). Where did I go wrong?also I can't figure out wavefuntion after t time elapse analytically.please help me out.