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Cake day: September 3rd, 2023

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  • Someone did the math above.

    https://old.lemmy.world/comment/16391357

    So, a typical pupil is around 2 mm in diameter in bright conditions. With the Rayleigh limit that results in an angular resolution of 1.22 * 60010^-9 m / 210^-3 m = 3.66*10^-4 rad

    At a distance of 5 x 3 mi = 15 mi = 24.1 km this corresponds to a point to point distance of

    tan(a/2) = (d/2)/l

    d = tan(a/2) * l * 2 = tan(3.66*10^-4) * 24100 * 2 = 8.8 m

    So in conclusion, with regular, human-like eyes he could discern points that are at least 8.8 m apart in the best case scenario. Discerning hair color from the color of the clothes would need a much higher resolution, and the horsemen are probably not 10 m apart from each other either. And again, this is a theoretical limit, real-world resolution would probably be significantly lower.








  • BlanketsWithSmallpox@lemmy.worldtoScience Memes@mander.xyzNom nom
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    1 year ago

    I’ve always been a fan of using > and < but in the general use of lesser than or greater than, however, the symbols were always interchangeable to me since it always depends on where you put the defined integer, correct?

    If I want to say something is less than 37. It can either be 37 > or < 37.

    Because in that scenario the imaginary integer n is always on the opposite side of the symbol.

    37 > n

    n < 37

    So why did > ever become greater and < be less than? Doesn’t it also depend on how your text is written? If people reading from right to left or down to up vs left to right and up to down, means it’s reversed.

    The open part of the caret is where the bigger number is, the opposite side is where the lesser number is.










  • The gf has always had issues with letting myself be the dogs and kids jungle gym. She doesn’t see the irony in letting the cat on her lap, how gross hair balls weekly are, why the bed is gross when you let the cat on it… So much.

    But oh the moment something approaches twenty pounds is off limits? Nah, fuck that. Just…

    STOP! You just not hop on pop!