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Old 12-5-2008, 07:41 AM   #11
Cavernio
sunshine and rainbows
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Join Date: Feb 2006
Age: 43
Posts: 1,987
Default Re: "Time Travel"

About what you would see if you were moving faster than light, I agree with gausmaster in that you would simply not see the light you're moving away from. Even a beam of light that is 0.0000001mm away from your eye will never be able to reach your eye.
You wouldn't totally see nothing though, because what our eyes pick up is more than the 180 degrees in front of us. We actually see about 10 degrees behind us on either side, http://en.wikipedia.org/wiki/Visual_field , so in those 10 degrees, we'd see light. As a side note, the light we would see if we looked forward would be at least twice as 'bright' because we'd be seeing at least twice as much of it in the same amount of time.

I got into a discussion about this last night, and the other person said that we would be seeing light all distorted, and they gave an example which this morning I realized was incorrect. See, I've been thinking about this problem like light has individual particles. He was thinking about the light simply surrounding us, like, say, water in a stream. If we sit in a stream, we're surrounded by the water, just like if we sit in light, we're surrounded by light. Then he said, pretend we're moving in the stream, swimming downstream with it. At this point, if we're actively swimming in it, we're moving faster than the water is. Yet we're still surrounded by water, there's water touching us behind us. This stumped me for awhile, but there's one serious problem with this: the water changes speeds depending on where it can go. The moment we'd move in the water, the water comes flowing in behind us at a much much faster speed than it flows downstream. Light, however, doesn't do that, because we're saying we'd be travelling faster than its maximum speed.

Last edited by Cavernio; 12-5-2008 at 07:51 AM..
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