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Seeking New Laws: Theory, Prediction, and Observation
Richard Feynman's final Messenger Lecture, reflecting on the scientific process itself—the interplay between theoretical models, empirical predictions, and the role of observation in validating knowledge.
Richard Feynman examines how physicists stand relative to nature, reviewing what is known about fundamental particles and forces before detailing the core process of scientific discovery: guessing laws, computing their consequences, and comparing them with experiment. He discusses the challenges of approximate symmetries, the pitfalls of vague theories, and the role of beauty and simplicity in recognizing true physical laws.
Lecture Guide
- 1The scientific method fundamentally rests on three steps: guessing a law, computing its consequences, and comparing them directly with experiment.
- 2A physical theory can never be proven definitively right because future experiments may always reveal a flaw, but it can be proven wrong.
- 3True fundamental laws of nature consistently turn out to be simpler than initially expected.
- 4Vague theories that do not allow for precise computation cannot be tested or falsified.
Proofs, Examples & Demos
Assumed Background
Part of course·Lecture 7 of 7
PHY 1964: The Character of Physical Law (Messenger Lectures)
Previous · Lecture 6
Probability and Uncertainty: The Quantum Mechanical View of Nature
End of sequence
Final session in this series
About the lecturer
Richard Chace Tolman Professor of Theoretical Physics, California Institute of Technology (1950–1988)
Nobel Laureate in Physics renowned for quantum electrodynamics, path-integral formulation, and The Feynman Lectures on Physics.
3 courses · 23 lectures in archiveView profile
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