![]() ![]() It’s a concept that makes no sense on a human scale, but that’s quantum mechanics for you. The two error sizes, when multiplied together, will always exceed a certain value. It states that any effort to reduce the error in your measurement of a particle’s momentum (that is, its mass multiplied by its velocity) will increase the error in your measurement of its position. This bizarre trade-off arises from Heisenberg’s uncertainty principle, which was first laid out by German physicist Werner Heisenberg in 1927. For quantum particles, this is a reality: the better you know a particle’s speed, the less certain you are of its position. Imagine driving a car fitted with a GPS navigation system that glitches every time you look at the speedometer.
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