Glossary
ultraviolet catastrophe
"ultraviolet" because the divergence occurs at high (ultraviolet and beyond) frequencies.
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Quantum Mechanics
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Chapter 1: The Quantum Revolution: Why Classical Physics Broke and What Replaced It
Related Terms
$-mc^2\alpha^2/(2n^2) = -13.6\,\text{eV}/n^2$
$mc^2$
(b)
1. Delft (Hensen et al., Nature 526, 682, 2015)
1. Electron lines (solid lines with arrows):
11.1
14.1
14.2