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But some numbers, called dimensionless numbers, have the same numerical value no matter what units of measurement are chosen. Probably the most famous of these is the "fine-structure constant, " .... Physicists love this number not just because it is dimensionless, but also because it is a combination of three fundamental constants of nature.John Archibald Wheeler
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Physicists love this number not just because it is dimensionless, but also because it is a combination of three fundamental constants of nature. Why do these constants come together to make the particular number 1/137.036 and not some other number?John Archibald Wheeler