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How a WashU physicist paved the way for quantum mechanics 100 years ago

Arthur Holly Compton conducted groundbreaking research at Washington University in the 1920s. He also enjoyed playing banjo with his students.
Washington University archives
Arthur Holly Compton conducted groundbreaking research at Washington University in the 1920s. He also enjoyed playing banjo with his students.

One hundred years ago, physicist Arthur Holly Compton made his Nobel Prize-winning discovery related to X-rays at Washington University in St. Louis.

At that time, X-rays were largely understood to be a wave-like phenomenon. Compton鈥檚 experiments showed that X-rays have duality: .

Erik Henriksen joins St. Louis on the Air

鈥淚t was really huge; this was an unexpected discovery,鈥 said Erik Henriksen, an associate professor of physics at Washington University. 鈥淭o say that something could behave both like a wave and a particle in somehow the same object was confounding then 鈥 and honestly, it's quite confounding now, but it underlies our entire understanding of the universe through quantum mechanics.鈥

Henriksen joined Friday鈥檚 St. Louis on the Air to discuss how Compton鈥檚 discovery paved the way for quantum mechanics and modern-day astrophysics.

Related Event
What:
When: "Compton and WWII: the Manhattan Project" on Oct. 22, "Arthur Holly Compton鈥檚 influence on WashU Chemistry" on Oct. 29 and "Compton Forever" on Nov. 5
Where: Crow Hall ()

鈥 brings you the stories of St. Louis and the people who live, work and create in our region. The show is produced by , , and . is our production assistant. The audio engineer is .

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Emily is the senior producer for "St. Louis on the Air" at 漏 2024 外网天堂.