• blockheadjt@sh.itjust.works
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    4 months ago

    I wonder if there are some metals that appear grey to us but actually have a color, we just don’t see it because it’s outside our visible spectrum

      • RustySharp@programming.dev
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        4 months ago

        … when charged particles move faster than the speed of light

        So that got me curious, and found this

        nothing travels faster than light in vacuum, but light can be slowed down and something can travel faster than this “slower” light

        Somehow I’ve gone through decades of life without knowing this…

        • Ephera@lemmy.ml
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          4 months ago

          What also surprised me is that the speed difference depending on medium is actually quite substantial. For example, glass has a refractive index of about 1.5.

          So, the speed of light in glass is c/1.5 ≈ 200.000 km/s, i.e. 66% of the speed of light in vacuum.

    • Dicska@lemmy.world
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      4 months ago

      That is the very definition of colour. The part of the electromagnetic spectrum that we can see. The rest of the scale includes infrared, gamma or X-ray. If you want, you can call them invisible colours - or you can call green superhighultraviolet.

      • blockheadjt@sh.itjust.works
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        4 months ago

        If a bee sees a color we cannot, it would be pretty silly to insist it’s not a color on the basis of us being unable to see it, wouldn’t it?

  • Phoenixz@lemmy.ca
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    4 months ago

    The top two houses are in LA at the beach, no?

    Not sure why, I don’t even live in the US, but I recognize them