Originally posted by griftadan
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Is it possible to travel through time ?
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Originally posted by SombraHow though? E=mc2 ;)
the point was that we couldnt build a manageble space craft that went the speed of light, as it is all mass, and as something that has mass aproaches the speed of light its increasingly turned to energy"I'm against picketting, but i dont know how to show it"
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When we blindly adopt a religion, a political system, a literary dogma, we become automatons. We cease to grow. - Anais Nin
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All electromagnetic radiation has no mass but does have momentum. Those of you "at Cern" may possibly do well to consider that.
One of my old chums still works there. PHD researching the modal variant on the mass of the Higgs boson. Well, a few years back. I would imagine the beam dump is still same old ...Where's the bloody gin? An army marches on its liver, not its ruddy stomach.
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Originally posted by LeaderJust because something can be converted into matter doesn't mean it has mass. Light in all it's forms is massless.
If photons have an impuls they have a corresponding mass.
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Originally posted by SombraLeader have you ever seen these little gadgets like a mill working on the basis of impacts of photons to turn?
If photons have an impuls they have a corresponding mass.
Photons are massless. Much like Scottie, you canna change the laws of physics.
-dale
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Originally posted by gunnutBut aren't those "relative?"
Your future is someone else's past...
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On the photons and mass thing.
http://math.ucr.edu/home/baez/physic...oton_mass.html
Not sure if it really clarifies the matter, but it does seem to give the current most popular opinion among scientists. Note, I said "most popular." I don't have the math for this sort of thing, so I can't say anything with authority, but it seems strange that something without mass can have momentum, i.e. "light sails."I enjoy being wrong too much to change my mind.
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As I understand it, gravity doesn't "pull" on anything. Rather it actually "bends" space-time, so that things moving through space are affected indirectly by the warping of space. I have a feeling, though, that eventually the warping of space-time and the exchange of carrier particles like photons in the other basic forces will be found to be different ways of looking at the same thing. Or not; I really don't know.I enjoy being wrong too much to change my mind.
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