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Does faster than light travel violate causality? Why/Why not? How?
  • This argument, as far as I know, relies on the nature of time dilation. You see as your velocity increases closer and closer to the speed of light, time itself begins to slow down. This is not an analogy or some fancy math trick, this is a real thing you can measure in the lab. As you get closer and closer to the speed of light time slows more and more. Such that as you reach the speed of light (again this is physically impossible at least for anything with mass) you can think of time as stopping. So for light or anything that moves at the speed of light they're kind of isn't such a thing as time, but I digress.

    So (again even though it's actually impossible), what happens as you start to go faster than light? Does this trend continue? If it does that would mean that time starts to reverse. And once you see that faster than light travel might imply time reversal, it should be easier to understand how this would violate causality. Because how do you get event A caused by event B when event B was before even A?

  • Blowing air out of your mouth, like blowing out a birthday candle, is just a DC form of talking.

    Error being blown out of your mouth is similar to DC ( direct current ) and that it's a continuous wave of air with frequency zero. While speaking is like AC ( alternating current), a longitudinal wave that moves back and forth at a variety of frequencies.

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    Trying to learn about opensource Silicon manufacturing.

    I've wanted to contribute to open source projects for years. Ive contributed to a few things in the past, but my expertise just isn't in programing (I'm a physicist), so it's hard to contribute meaningfully. Recently, I've heard about some open source silicon manufacturing and I'm intrigued, this is something I think I could contribute to significantly. I know of LibreSilicon, but I want to learn about other projects as well, and are there good resources to learn about the current state of projects. Thought I'd see what y'all know.

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