• @[email protected]
    link
    fedilink
    English
    946 months ago

    It’s the cooling of silica (really, any material) that makes it a glass, and even then, transparency in the visual wavelength is not automatically certain.

    • teft
      link
      English
      746 months ago

      Case in point, obsidian.

      • @[email protected]
        link
        fedilink
        English
        606 months ago

        Good example. Obsidian is apparently 70% silica. Iron is apparently what makes it black in color. If it’s thin enough, it is translucent.

        If you cool pure silica slowly enough, with impurities to cause seeding, you will get tons of crystals, not a single glass, that won’t be transparent.

  • 7heo
    link
    fedilink
    English
    39
    edit-2
    6 months ago

    3090 degrees is above its boiling point (which is 2950 degrees).

    So it doesn’t become “clear”, it literally vaporises.

    • @[email protected]
      link
      fedilink
      English
      76
      edit-2
      6 months ago

      You are talking Celsius while the meme is likely referring to F (you can tell because Obama)

      • Spzi
        link
        fedilink
        English
        16 months ago

        This ambiguity is what I had in mind when I read “let me be clear”. Though now I get it.

  • @Noodle07
    link
    English
    356 months ago

    Glassblowers: thanks Obama

  • @_sideffect
    link
    English
    216 months ago

    I wonder how they figured that out

    Did molten lava touch sand and then they were like 😳

    • @[email protected]
      link
      fedilink
      English
      21
      edit-2
      6 months ago

      Maybe tektites? Natural glass formed when lightning meteorites strikes sand. I only remember the name because they share it with the jumpy spiders from Zelda

    • @jaybone
      link
      English
      56 months ago

      It’s like minecraft.

    • @Olhonestjim
      link
      English
      36 months ago

      If you spent your days cooking with fire, and your nights watching it and warming yourself, you’d definitely start tossing anything you could find into it just to see what would happen. People did this every day and night for eons.

    • teft
      link
      English
      1
      edit-2
      6 months ago

      deleted by creator

    • @[email protected]
      link
      fedilink
      English
      1
      edit-2
      6 months ago

      I think people just experimented a lot. Try enough random things, you’re bound to come across cool chemistry every once in a while. If they figured out how to make really hot fire, that opens the path to “let’s try making various things really hot to see what happens”.

      Of course, I know basically nothing about [pre]history or human development so I could be way off

    • @robocall
      link
      English
      16 months ago

      More like an orangey white like an incandescent bulb, maybe.