# Parity of a wavefunction

Can anyone help me understand what is meant by the "parity of a wavefunction"?

I know in terms of even/odd parity, that:

$$P \Psi(x,y,z) = \pm \Psi(x,y,z)$$

ie, P = +/- 1

But I don't know what "parity of a wavefunction" physically means...

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pam
The P operator turns $${\vec r}\rightarrow -{\vec r}$$.

Last edited:
malawi_glenn