• Rugnjr@lemmy.blahaj.zone
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    3 天前

    There’s a convincing argument all numbers are imaginary. I’ve never seen a million of something in one place. Let alone a billion, or a trillion. Root 2? Get outta here. e, pi. Basically any useful number already has the property that i has (suspending disbelief until we can get rid of it again somewhere later down the line)

    • glibg10b@lemmy.zip
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      3 天前

      Pi can be seen in real life (obviously not with full precision, but close enough). Simply make a 1 cm rod on a lathe and measure its circumference, and you’ll see it’s ~3.141 cm

      The same goes for root 2. Simply measure the diagonal of a 1 cm square

      Not sure where you’d see e in real life, though (excluding as the base of an exponential, because any exponential can be trivially rewritten with any base)

      • @glibg10b @Rugnjr I ran this past my (engineer) SO and, after grumbling at being nerd-sniped, he came up with something you could measure to derive e.

        He said a capacitor filled through a resistor for a time unit equal to “RC” gives you a simple formula that solves for e.

        I think I may have got that right? Most of this is gibberish to me, but he gesticulated wildly and held up random electronic things at me so I think he had something.