What is the Planck Length, why’s it significant, and how could we even detect something that small?
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The length is 1.6×10^-35 meters, it’s significant because it’s the smallest measurable length. due to the heisenberg uncertainty principle (the one that says you can either measure speed, or momentum, but not both at the same time) it’d be impossible to have a more accurate measurement of length (unless you can break known physics)
It’s not so much a detection, more a calculation coming from combining a few constants in the universe (gravity, speed of light, electromagnetism, something called Coulomb constant, and a couple other things) to get an answer in Planck units, those units will be the same everywhere in every language, so they’re truly universal
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