Question: A quantum system has three energy levels, so three wavelengths appear in its emission spectrum. The shortest observed wavelength is (248 mathrm{~nm}); light with a

A quantum system has three energy levels, so three wavelengths appear in its emission spectrum. The shortest observed wavelength is $248 \mathrm{~nm}$; light with a $414 \mathrm{~nm}$ wavelength is also observed. What is the third wavelength?

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