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<p>to identify elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances.</p>

<p><big> Emission </big></p>
<p>In <a href="page.php?w=physics">physics</a>, emission is the process by which a higher energy quantum mechanical state of a particle becomes converted to a lower one through the emission of a photon, resulting in the production of <a href="page.php?w=light">light</a>. The frequency of light emitted is a function of the energy of the transition.</p>

<p>Since energy must</p><p>
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