Linked by Thom Holwerda on Thu 7th May 2009 22:24 UTC
Geek stuff, sci-fi... Today, the new Star Trek film has seen its official premiere here in The Netherlands tonight, and in honour of that, I figured an article on Space.com about the possibility of faster-than-light travel would make a good fit on OSNews. The article is quite technical, so bear with me on this one. I hope I get everything right.
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RE[2]: Comment by Laurence
by Drumhellar on Fri 8th May 2009 21:59 UTC in reply to "RE: Comment by Laurence"
Drumhellar
Member since:
2005-07-12

Actually tachyons travel faster than light.


Tachyons are a hypothetical particle predicted by super symmetry. While super symmetry is useful as an attempt to describe what the universe was like during it's first microseconds of existence as well as trying to unite gravity with the other forces (weak, strong, electromagnetic), the fact that it predicts a faster-than-light particle is viewed as one of it's major flaws.

Also light speed can vary, so...


No, it doesn't. the speed of light is constant, no matter your frame of reference. If you travel at 99% the speed of light, and shoot a beam of light in front of you, it travels away from you at ~300k km/sec relative to your speed. Aim backwards, it travels away from you at ~300k km/sec. Those two beams will arrive at stationary individuals at ~300k km/sec. This happens because, as you approach the speed of light, you increase in mass, your large mass gives you a powerful gravity field, and time slows down in powerful gravity fields.

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RE[3]: Comment by Laurence
by tobyv on Tue 12th May 2009 00:34 in reply to "RE[2]: Comment by Laurence"
tobyv Member since:
2008-08-25

the speed of light in a vacuum is a constant.

light travelling through other materials (such as water) goes slower, allowing other particles that aren't slowed - neutrinos, i think don't slow in water - to go 'faster than light', at least for a time.

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