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<a accesskey="3" href="page.php?w=exchange_interaction&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=chemistry">chemistry</a> and <a href="page.php?w=physics">physics</a>, the <b>exchange interaction</b> is a <a href="page.php?w=quantum_mechanical">quantum mechanical</a> constraint on the states of <a href="page.php?w=indistinguishable_particles">indistinguishable particles</a>. While sometimes called an <b>exchange force</b>, or, in the case of fermions, <b>Pauli repulsion</b>, its consequences cannot always be predicted based on classical ideas of <a href="page.php?w=force">force</a>. Both <a href="page.php?w=boson">boson</a>s</p><p>
<a accesskey="3" href="page.php?w=exchange_interaction&amp;p=2">3.Next</a>
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