Lyman limit
= Lyman limit
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{title2=$\lambda_{\mathrm{lim}}\simeq91.2\,\mathrm{nm}$}
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The <Lyman limit> is the short-wavelength limit of transitions to the <hydrogen atom> ground state. Its <photon> energy, approximately $13.6\,\mathrm{eV}$, is the ground-state <ionization energy>.