✴️ For decades, physicists believed the proton’s size was a settled number.
Then different experiments began to disagree — sharply.
This video explores how one of the most fundamental constants in physics became uncertain, why newer measurements changed the picture, and why the final verdict may still depend on tests that have not yet fully converged.
At stake is not just a number, but a deep assumption about how nature treats particles.
🔔 If you value careful science, unresolved questions, and precision pushed to its limits, subscribe and keep watching.
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Recommended reading related to this episode:
→ Introduction to Quantum Mechanics - https://amzn.to/4u6yfbu
→ Nuclear and Particle Physics: An Introduction - https://amzn.to/3N54M0N
→ Quantum Mechanics of One - And Two-Electron Atoms - https://amzn.to/40CnfF0
→ Quantum Electrodynamics (QED) - https://amzn.to/475sHUx
Credits:
Arpad Horvath, CC BY-SA 2.5 https://creativecommons.org/licenses/..., via Wikimedia Commons