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Why Is 1/137 One of the Greatest Unsolved Problems In Physics?

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Thank you to Squarespace for supporting PBS. Go to https://www.squarespace.com/pbs for a free trial, and when you are ready to launch, go to Squarespace.com/PBS to save 10% off your first purchase of a website or domain. PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime The Fine Structure Constant is one the strangest numbers in all o

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thank you to Squarespace for supporting PBS it's the job of physicists to worry about numbers but there's one number that physicists have stressed about more than any other and that number is 0.00729735256. approximately 1 over 137 this is the fine structure constant and it appears everywhere in our equations of quantum physics and we're still trying to figure out why oh foreign structure constant designated as the Greek letter Alpha just looks like one of the many constants of nature that power our laws of physics like the speed of light or the gravitational constant or Planck's constant but there's something so weird and so compelling about this number that many of the founders of quantum mechanics obsessed over it Paul direct called it the most fundamental unsolved problem in physics Wolfgang Pally said when I die my first question to the devil will be what is the meaning of the fine structure constant even Richard Feynman pondered its Mysteries his entire