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Happiness
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The following text considers the possible wave functions when the potential is symmetric about ##x=0##.
Why must even functions have an even number of nodes?
##y=sin^2x## is even but always have an odd number of nodes in any interval centred about ##x=0##.
The part preceding the above text:
Why must even functions have an even number of nodes?
##y=sin^2x## is even but always have an odd number of nodes in any interval centred about ##x=0##.
The part preceding the above text: