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Conversation Between TheThunderBringer and Eris

29 Visitor Messages

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  1. Possibly, but don't count on it. It's also fairly likely that he's gonna answer but be wrong (because chemists frequently think they know physics, only to be crazy wrong).

    I only speak Swedish and English.
  2. Aha, interesting, that was bugging me in school today, lol. Do you think my chem major teacher would be able to answer some of these questions?
    PS: What other languages do you speak?
  3. Yes, the light will never vanish (assuming ideal space with no dust or particles to absorb it), but it will grow fainter with distance, so after a while, it's going to be impossible to see (because it's so thinly spread out). It's easy to over-complicate the answer to this question a lot with quantum mechanics and stuff, but I think this answer should do.
  4. Wait...if light moves at light speed, doesn't that mean that time doesn't pass for it? Would that mean that light will always exist? If you shined a ray from a flashlight into the depths of space, would it continue moving? Because when you turn of the flashlight, it's gone...is it still there?
    Do you have any idea what I just said?
  5. Ah, I get it now, and I'm guessing I'll understand it more deeply the further I get in the book. Thanks for the help ^^
  6. Speed (in some frame of reference) is sort of a measure of your rotation in space-time. When you are standing still, you move only in time; when you move near the speed of light, you move mostly in space (and very little in time). The reason you can't move faster than the speed of light because you can't more than -only- move in space.

    As for why the speed of light is the speed of light, it's just a physical constant. Like the mass of an electron.

    As for why light only travels at the speed of light, it's because they have no mass. All massless particles move at the speed of light.
  7. Why can't you travel at the speed of light? And why is light its own benchmark for velocity?
  8. Question 1

    No. In fact, you can't travel -at- the speed of light, only very close to it.

    Question 2

    Because all frames of reference in relativity are equal. What this means is that speed is always measured relative to something. What relativity does is distort space-time in different frames of reference. So an outside observer will see a spaceship that travels at 99% the speed of light, and a light beam next to it traveling at 100% the speed of light, and the person in the ship will observe light next to it traveling also at 100% the speed of light.

    Question 3

    First of all, you can't travel at the speed of light, only very near it. And at relativistic speeds, you can't add velocities like you do normally. If you run at 1 m/s back and forth relative to the ship, an external observer will see much smaller speed changes.
  9. So I've been reading that book (haven't gotten around to just sitting down and reading a good chunk of it yet, though), and have a question or two.
    Can you travel faster than light?
    If you're going at light-speed, why does a beam of light parallel to you still appear to move 180 million mi faster?
    If you're in a space ship traveling at light speed, what happens if you run from the back of it to the front? Would you be going faster than the speed of light?
  10. Ah, maybe I'll check one out afterwards. It came in the mail yesterday, by the way; gonna try to read a lot over the weekend.
    I had another random question...but I can't remember it...hm.
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