• AFineWayToDie [he/him]
      ·
      3 years ago

      "C-decay" is a wingnut creationist proposal to explain why we can observe objects more than 6,000 light years away, even though the universe was only created 6,000 years ago. "Well, maybe light used to move faster."

    • Llituro [he/him, they/them]
      ·
      3 years ago

      Laws of physics are only laws insomuch as we can consistently verify them in our local bit of spacetime, as we can currently perceive them. Nothing says that it can't change, we just wouldn't have any model to describe a driving mechanism for that. That said, searches for inconsistencies in this aspect of relativity are known as Lorentz invariance violations.

    • HornyOnMain
      ·
      3 years ago

      This does actually happen to a small degree when the light is moving inside of something that's already moving (e.g. a very fast spaceship travelling at almost the speed of light) when observed from outside the spaceship. I can't remember why but it's something to do with quantum physics (I think, I wasn't paying attention in my physics uni lectures)

        • HornyOnMain
          ·
          3 years ago

          I might be talking about something deeper than that but I'm not sure because I never paid attention in my physics lectures

    • WaterBear [they/them, comrade/them]
      ·
      edit-2
      3 years ago

      Strictly speaking it does, in media, more strictly speaking doesn't look for the light in media as if it's slower.

      We could add that m isn't static either and that in the useful undergrad formulation you got multiple terms, and we got a ton of useful results from that equation.

      Light energy, yeah the cones it creates and the symmetry between dimensions of space and time are kinda rad and already without going deeper something akin to matter energy light equivalence for not exact meanings.

      But if one would argue with them the best way would be to not argue but post ppb