• KristellA
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    3 hours ago

    There’s a solar farm type that is literally that. Thousands of mirrors focussed onto one photovoltaic cell.

  • glups@piefed.social
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    6 hours ago

    The world should all agree that laser needs to be spelled with a Z. Lasers are cool, Zs are cool. It’s a s simple as that. The world could use this sort of unifying cause

    • Zamboni_Driver@lemmy.ca
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      3 hours ago

      You spelled it with an S though… Maybe take a look in the mirror before judging others.

      If you’re not brave enough to take part in changing the world, how can you expect others to do it for you?

  • queermunist she/her@lemmy.ml
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    14 hours ago

    Lasers are coherent, I think you need a lasing medium for that.

    You could focus the light into a single point, sure, but that’s not really a laser in the technical sense.

  • Tuscy@lemmy.world
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    9 hours ago

    That’s what pedo musk is trying to do with his 1 mil satellites. He just needs a gold phantom of opera mask for half his face to complete his identity.

      • Multiplexer@discuss.tchncs.de
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        3 hours ago

        Read the “What if”, it is really interesting!

        It explains why this holds for any optical system, including mirrors, showing it with a whole bunch of wildly different explanation approaches.

        I even understood one or two of those… ;-)

    • GreyEyedGhost@piefed.ca
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      8 hours ago

      They did everything wrong in that video. On of their assertions was that soldiers wouldn’t be able to keep their mirrors properly polished. I don’t know about now, but even 40 years ago, polishing brass was a common punishment detail. I imagine it was moreso in Archimedes’ day, when brass and bronze were the thing to use. Also, there are techniques for using a signaling mirror to hit a specific location which aren’t that complicated, would certainly be something that Archimedes could figure out, and would work better for aligning the mirrors than “try really hard to aim at that spot.” The ridiculous assumptions they make besides those also detract from the goal of a best effort to test the heat ray, and seem to stem from the idea that people back then were stupider than we are rather than just not having accumulated as much knowledge as we had.

      It was entertaining, but not as informative as I would have liked.

      • papalonian@lemmy.world
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        6 hours ago

        My bad, I forgot there were two episodes on this, I think maybe you only saw the first one or parts of it. There was a huge wooden structure with hundreds of mirrors arranged in a concave shape that almost perfectly aligned all mirrors’ reflections into one spot and absolutely nothing happened. Even with perfect mirrors and modern construction tools and techniques we couldn’t recreate it.

        • GreyEyedGhost@piefed.ca
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          6 hours ago

          Ah, that could be. Probably due to responses to their first one where they had a bunch of college students holding little mirrors and trying to aim them, and I’ve never watched Mythbusters regularly.

      • fuzzzerd@programming.dev
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        6 hours ago

        To be fair, they did build a customised rig to aim, using real mirrors to simulate a perfect case scenario, and still failed. While they did mention those issues, they did try to replicate the results pretty faithfully IMO.