= Yang Chen-Ning
{c}
{tag=Physicist}
{wiki}
= Chen Ning Yang
{c}
{synonym}
= C. N. Yang
{c}
{synonym}
<Yang Chen-Ning> and <Tsung-Dao Lee> questioned whether <parity> conservation had actually been tested in the <weak interaction>. Their 1956 paper separates established evidence from an assumed symmetry and proposes concrete tests in nuclear and particle decays. An angular correlation that changes sign under spatial reflection can distinguish a process from its mirror image.<Question of Parity Conservation in Weak Interactions by Tsung-Dao Lee and Chen Ning Yang>[1956, evidence review and proposed parity tests]{ref}
A <physicist>.https://www.nobelprize.org/prizes/physics/1957/yang/biographical/[Independent professional profile]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/%E6%A5%8A%E6%8C%AF%E5%AF%A7_Chen_Ning_Yang.jpg?width=260]
{title=Portrait of <Yang Chen-Ning>}
{description=Academia Sinica (中央研究院); 30 March 2007. https://commons.wikimedia.org/wiki/File:%E6%A5%8A%E6%8C%AF%E5%AF%A7_Chen_Ning_Yang.jpg#Licensing[Academia Sinica attribution permission; Government Website Open Information Announcement], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:%E6%A5%8A%E6%8C%AF%E5%AF%A7_Chen_Ning_Yang.jpg}
{width=260}
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