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Rhett Allain

Rhett Allain

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Physics professor and writer translating everyday physics, instrumentation, and problem‑solving; frequent course/playlist resources.

Jules Verne's Moon‑Earth Neutral Point: Surprisingly Accurate?
Social•Apr 3, 2026

Jules Verne's Moon‑Earth Neutral Point: Surprisingly Accurate?

In the book From the Earth to the Moon, Jules Verne calculates the "neutral point" of gravity based on the density of Earth and Moon. His location was 47/60th the way there. Was he right? https://www.instagram.com/p/DWpIDBgAJuq/

By Rhett Allain
University Forces Safety Quiz, Denies Ergonomic Upgrades
Social•Apr 2, 2026

University Forces Safety Quiz, Denies Ergonomic Upgrades

University required quarterly safety training: be careful when using a computer. If you don't have a proper desk, you will hurt yourself. Click this quiz to acknowledge. me: Oh, I need a better desk and chair to improve ergonomics. University:...

By Rhett Allain
ISS Sections Experience Varying Accelerations Despite Uniform Weightlessness
Social•Apr 2, 2026

ISS Sections Experience Varying Accelerations Despite Uniform Weightlessness

My first answer is no. It’s different weightless at Lagrange point and orbit - but you would never feel the difference. In orbit, different parts of ISS have different orbits technically and thus different acceleration. Same is tru near L1,...

By Rhett Allain
Understanding EM Wave Reflection, Refraction, and Brewster’s Angle
Social•Mar 31, 2026

Understanding EM Wave Reflection, Refraction, and Brewster’s Angle

New #electrodynamics #physics video - looking at reflection and transmission of electromagnetic waves. Snell's law and Brewster's angle. https://youtu.be/_dFKj6OE05I

By Rhett Allain