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Homework Statement
How does the wave function of spin 1/2 change under parity?
Homework Equations
The Attempt at a Solution
The behavior of the eigenfunctions of orbital angular momentum L is easily seen from their explicit form, namely spherical function Yml is multiplied by (-1)l, where l=0,1,2,...
Spin operator S commutes with the parity, so the eigenket of S is expected to be a parity eigenket.