= Seth Neddermeyer
{c}
{tag=Physicist}
{title2=1907–1988}
{wiki}
= Seth Henry Neddermeyer
{c}
{synonym}
= Seth H. Neddermeyer
{c}
{synonym}
<Seth Neddermeyer> and <Carl David Anderson> studied the penetrating component of <cosmic rays>, contributing to identification of the <muon>. Measurements of particle <energy loss> in dense absorbers revealed events that were too penetrating to fit the expected behavior of <electrons> at the measured <momentum>. Comparing track curvature and penetration supplied evidence about particle <mass>. The result showed why similar-looking charged tracks could belong to physically different particles.<Note on the Nature of Cosmic-Ray Particles by Seth Neddermeyer and Carl David Anderson>[1937, energy-loss and penetration comparisons; Caltech-hosted original-paper record]{ref}
A <physicist>.https://digital.archives.caltech.edu/collections/OralHistories/OH_Neddermeyer_S/OH_Neddermeyer_S.pdf[Independent professional biography and identity]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Seth_Neddermeyer.jpg?width=260]
{title=Portrait of <Seth Neddermeyer>}
{description=Manhattan Engineer District. Public domain (US Department of Energy / predecessor employee work). https://commons.wikimedia.org/wiki/Template:PD-USGov-DOE[Source usage terms], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Seth_Neddermeyer.jpg}
{width=260}
Back to article page
