Throughout the 20th century, quantum mechanics evolved from the old quantum theory of 1900 to fully-fledged quantum mechanics by the 1920s, then advanced to quantum field theory by the 1940s through work by Feynman, Schwinger, and Tomonaga on quantum electrodynamics.
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Jim Al-KhaliliEvidence Quote
“[9:46] if you think about the the uh the progression of quantum mechanics throughout the 20th century, we start with the old quantum theory of 1900. Uh by the 1920s, we have fullyfledged quantum mechanics...that develops by the 1940s people like the great American physicists Richard Fineman together with Schwinger and Tommanaga they develop what's called quantum electronamics”
Created: 8/11/2026, 5:36:17 AM
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