Werner Heisenberg

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1. 01

   You cannot know both exactly where a particle is and exactly how fast it moves — the universe itself sets that limit.

   Physics and Philosophy: The Revolution in Modern Science · 1958

   Nature imposes a fundamental limit between the precision of a particle’s position and its speed

   Try photographing a fast-bouncing ball in a dark room using a flash. The flash shows where the ball is but also nudges it, changing its speed. Tiny particles work the same way, except the limit is not your camera's fault — nature itself is built that way.

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