Canonical · Physics & Entropy · Paper

The Uncertainty Principle

Werner Heisenberg · 1927

"There is a fundamental limit to how precisely you can simultaneously know a particle's position and momentum — not because of instrument error, but because of the underlying nature of reality at the quantum scale."

The idea

Heisenberg showed in 1927 that some pairs of properties in nature — like a particle's exact location and exact speed — can never both be known precisely at once. Not because measurement is imperfect, but because reality itself doesn't have both values pinned down simultaneously.

Why it works

The takeaway — recall it first

General Relativity

"Gravity isn't a force pulling objects together — it's the curvature of spacetime itself caused by mass and energy, and objects simply follow the straightest possible path through that curved geometry."

Albert Einstein · PaperContinue→