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(2) does work to get $\langle P \rangle$ but acting $\hat{P}$toon the bra rather than the ket introduces an extra minus sign which might cause trouble. So it is just easier to use (1)
(2) does work to get $\langle P \rangle$ but acting $\hat{P}$to the bra rather than the ket introduces an extra minus sign which might cause trouble. So it is just easier to use (1)
(2) does work to get $\langle P \rangle$ but acting $\hat{P}$on the bra rather than the ket introduces an extra minus sign which might cause trouble. So it is just easier to use (1)
(2) does work to get $\langle P \rangle$ but acting $\hat{P}$ to the bra rather than the ket introduces an extra minus sign which might cause trouble. So it is just easier to use (1)
