The <a href="https://en.wikipedia.org/wiki/Franck–Hertz_experiment" id="mwYw" rel="mw:WikiLink" title="Franck–Hertz experiment">Franck–Hertz experiment</a>, a pillar of <a href="https://en.wikipedia.org/wiki/Introduction_to_quantum_mechanics" id="mwZA" rel="mw:WikiLink" title="Introduction to quantum mechanics">quantum mechanics</a>, is presented to the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Deutsche_Physikalische_Gesellschaft" id="mwZQ" rel="mw:WikiLink" title="Deutsche Physikalische Gesellschaft">German Physical Society</a>.