I am interested in the subsequent measurement of energy, like assume the energy of the electron was measured to be $E_1$ and the wavefunction of the electron is described by a finite superposition of eigenfunction of energy. After the first measurement will the subsequent measurement have the same energy measurement which is $E_1$.
I think this question has been asked multiple times, but what I am confused about is that if all the subsequent measurement was of state $E_1$ that means that the uncertainty in energy is zero, which implies that the uncertainty in time measurement has to be infinite.
