If a train was to move so it would approach the speed of light ,would it turn into pure energy?
449483
no, actually it would become pure mass. you will be adding infinite energy and that energy will transform into mass so you would have an ever stretching train, and of course it will break into pieces and the pressures will make the train explode making it energy... so changing my original answer, if your train is breakable, it will turn into pure energy, it will burst into pieces destroying the railroad and everything around it ^^
1119165
You would turn into energy.
1170940
Very good question it is.\nbut\nPhoton is pure energy is it not?
435706
An instant.. There's the nutty problem. You are saying something moves from one place to another with no time lag.\nMuch much faster than the speed of light. \nMass is inversely related to energy and you want the thing to exist in two places for and instant but then, not to exist at the same two places for an instant. \nThis is similar to the fly hitting the windscreen... Does it stop moving, actually that is easier to answer.\nIn order to move something at the speed of light the something cannot have a rest mass. So if you wanted to Transport something, you'd firstly have to change it into energy. This is indeed possible, but not at the moment in our evolution. Once you've got it into energy you'd have to send it somewhere, at the speed of light and then reconstitute it at the other end.. Possible for inanimate objects but may be a bit tricky for living organisms.. More tricky still would be to transport our personalities, mind you there are a number of people I think could do with this transportation!!!
1018446
I know Einstein came up with it and it deals with energy.\n\nEnergy(E) = Mass(m) * Speed of Light(c2)
644825
According to Special Relativity Theory, when you are transporting a mass at a speed near lightspeed, the energy needed to increase your speed rises to infinity. We can't provide the system with enough energy to reach the light of speed.\n\nEnergy, though, can travel at the speed of light because it has no mass. If we could transform a mass in energy (remember: E = m c^2) and re-create it at destination, travelling at lightspeed would be possible.\n\nBut, as Dark Helmet said, speed of light is too slow. We need ludicrous speed!
669938
The universe, from your reference frame, would be length contracted into a single plane perpendicular to your direction of motion, thus enabling you to cross it by traveling no distance. Time for you would be stopped completely, thus you would travel this no distance in no time, at a speed of precisely c in your reference frame (light does that in every reference frame), despite the fact that by definition you are stopped in your own reference frame. Every other light ray would also travel at c in your reference frame and so would pass you in a finite period of time, except time would never move forward and so it wouldn't actually go anywhere. If you looked outside at the infinitesimally thin slice of universe, you would find that the area no distance ahead of your light ray is in the future of the origin (as viewed from any valid reference frame) and the area no distance behind it would be in the past. The beam you are riding on would have no frequency and would appear as a constant electric or magnetic field. Since the beam you are riding on is still traveling at c, it would therefore have infinite wavelength and so the field in question would permeate out to infinite distance in front of and behind you - not that it matters because there is no universe in either place. Speaking of the universe, every particle in it would appear to you to be infinitely massive and the universe would thus collapse on itself infinitely fast, if only there were time for it to do so.\n\nBy the way, there is a reason the speed of light is not considered a valid reference frame in special relativity. This is it.
1004891
Nope...force is what you are looking to determine.  Force equals mass x acceleration.  The fly would have to travel MUCH faster to have any impact on the train.  Also, the fly, once it made initial contact with the train, doesn't decelerate all at once...parts of it continue moving after other parts stop, and some parts start moving in East and West directions...SPLAT!
366136
Not really - As it would travel at the speed of light (or the lack of) - but there would be a delay of a few picoseconds.....
44895
Interesting quatum phenomenon question.  The lights would come on, but they might appear strange to an observer due to the Doppler effect.  You, inside the car, would continue to see a headlight 'beam' because light's speed is a universal constant and not dependent on the speed of the source.  However, traveling beyond the speed of light in conventional space is not possible, to our knowledge.  For one, it would require infinate energy.  It would also cause macro-scale collapses in casaulity (effects happening before the cause).  To date, these bizzare effects have only been seen on quantum scales.
502927
Energy equals mass times the speed of light squared
1042298
No it can't.\n\nLaser light goes at exactly the speed of light.
928008
The short answer is all objects with an initial "rest" mass become infinitely massive as their velocity approaches the speed of light.\n\nMost of the energy expended to make an already fast mover go faster, as it approaches the speed of light, goes mostly into increasing its relativistic mass and increasingly less into increasing its velocity. The formula for this is (which I suggest you graph to see what's happening):\n\nM = m / SQRT (1 - v^2/c^2), where M is the relativistic mass, m is the initial "rest" mass, v is the relative velocity, and c is the velocity of light.\n\nAs v approaches c, the their ratio approaches unity, 1 minus the square of their ratio approaches zero, the square root approaches zero, and the relativistic mass approaches infinity.\n\nThis doesn't come about because of theory. This is observation. The Special Theory of Relativity tries to explain what is observed.\n\nThe web site cited has an interactive Java applet that will let you plug in velocity to see how much the relativistic mass increases as an object approaches the speed of light.\n\nNow, if somehow an object were already going faster than the speed of light, it presumably would shed mass if it went even faster and move backwards in time. Tachyons were proposed as particles that could do this, but no one has ever observed a tachyon.\n\nAs for fighter jets, they can and do go a LOT faster than the twice the speed of sound, but no where near light speed.
895733
Energy=Mass * (speed of light)^2
989387
The only thing that can travel at the speed of light is light. So basically yes.
838380
Photons that travel at the speed of light have zero mass.  Photons are tiny packets of pure energy.  Theoretically photons could be converted to mass using Einstein's equation E = mc2 but would then be unable to travel at the speed of light.  Do photons really exist?  Enough of them in the UV range can give you a sunburn.
799784
In theory, yes.  Because the light particles that were traveling slower than you would have been slower.  Very good question.  However, speeding past the speed of light would mean the fundamentals of E = Mc^2, would cease to make sense.