is it possible to go back in time?let me explain,light travels at 186,000 miles per sec,and if you were in out
815830
Time would stop and or reverse for you and your spacecraft, but time on the earth would continue to move forward.  Actually when you stopped you would be far into the future because years would be passing on the earth in seconds of time on your spacecraft.  Common theory is that you can not travel faster than the speed of light.  The reason for this is that the closer to the speed of light that you travel your volume gets exponentially smaller and your mass gets exponentially larger.  So that at the speed of light you would need an infinite amount of fuel to propel an infinite mass that has a volume of zero.  Essentially you would be disintegrated at the speed of light.
506771
Actually by what Einstein explained, da light will still be in  front of da car, it won't go behind u no matter how fast u r going even if u r faster dan da speed of light. Weird? rit. I too thought so, It was explained in discovery channel. Well I'll try 2 explain it 2 u, But it wud hav been easier if I cud actually show it by som animations. When u r travellin at da speed of light, time stops. Ya it does. Time is somthin like per user setting, it is unique for u & each & every one. Think dat ur carrying an Einstein's clock, which is a simple devise with 2 mirrors facing each other with a photon bouncin of the mirror. Each time it bounces from a mirror u'll hear a tic sound, that will b 1 second for u. Say u travel at a speed little less dan light u r movin forward but da photon has 2 move a lot more distance than it initially had been, which was in a straight line, but now it's motion will b som what like a hypotenuse, so it has 2 travell more distance dependin on ur speed. So ur 1 sec will not be da same as 1 sec is for som 1 on earth. So actually ur headlight will be actually movin faster dan u no matter what
691265
Yes, did read about time travel when I was a kid.\n\nIf you are thinking of just being a passive observer, then a natural time machine is readily available to everyone. When we look at the stars, we are seeing the light of the past. The nearest star is 4.5 lightyears away, so we are looking at events that had happened during 2001. Other stars are even further away, so the light source carries information that are even older.\n\nThe images of the Earth, our Sun & the other planets in our Solar system are also being carried into space and this natural "moving historical records" are being beam into deep space. If there is a natural reflector somewhere out in space, we may be able to see such an image being reflected back to us in theory, so we could potentially see our own past.\n\nPhysically, traveling into the past or future would be a great many orders more difficult.
159615
Time would conquer you. considering that to all outside observers you would vanish. From your viewpoint the entire universe would cease to exist even if you were to slow down now you would find yourself in a limitless and absolute void with no reference. You would be in absolute solitude.\n\nTraveling at relativistic speeds (fractions of the speed of light) distorts time relative to outside observers. time/the inverse of the factor of c.\n\nIf you were to travel at 1/1,000,000,000 the speed of light 1 second to an outside observer would only be .999999999 seconds to you.\nIf you were to travel at 1/2 the speed of light 1 second would be .5 seconds\n\nI believe that this maybe one of the thoughts that lead Einstien to the statement "Time is an illusion, although persistent, still just an illusion.
64217
to answer your question it is possible to go faster the the speed of light. The speed of light is 186,000 miles per second.\n\nIf zooming beyond the local speed limit is punishable by law, then some scientists may have a gargantuan speeding ticket to pay. \n\nIn a controversial experiment reported in this weeks journal Nature, scientists at the NEC Research Institute in Princeton, New Jersey claim to have broken the ultimate speed limit -- the speed of light. Though hotly contested, some say this achievement could dramatically increase the speeds at which we can send and receive information. \n\nTaught in physics classes the world over, Albert Einsteins theory of special relativity holds that no object or information can move faster than the speed of light in a vacuum, or 186,000 miles (300,000 kilometers) per second. But NECs Lijun Wang says he created an experiment in which a light beam raced through a gas-filled chamber so quickly, it exceeded the speed of light by a factor of 300. Whats more, the light pulse appears to have left the confines of the chamber before it even entered a seemingly impossible occurrence according to theories of causality, which predict that causes must always precede their effects. \n\n"It sounds crazy, but this can actually occur," said Raymond Chiao, a physicist at the University of California at Berkeley. Chiao, one of a group of researchers who have been working to break the speed-of-light limit, explained that although a common object such as a baseball could never be flung faster than the speed of light, pulses of energy with certain complex properties have been known to bend the rules. \n\n\n\n"It sounds crazy, but it actually can occur." \n\n\n\n\nIn fact, several recent experiments, including one done by Chiao earlier this year, have pointed to energy pulses zooming faster than light speed. Yet each of these experiments has been encumbered by severe limitations on measurement or observation of the energy pulses. In contrast, this latest experiment is being touted by some as the most dramatic example yet of light breaking its own speed barrier. \n\n"The effects are much larger and more spectacular" than previous observations, said Chiao. \n\nIn Wangs experiment, a pulse of light passed through a small chamber filled with atoms of elemental cesium. A light beam traveling through such a medium has two different velocities a velocity for the individual light waves in the beam and a group velocity for the entire beam. Oddly, some light waves in the beam can actually travel backward for miniscule amounts of time, creating a sort of "tail" behind forward-moving waves. As such, a light wave and its tail can leave the gas cavity at different times, creating the effect that the light beam has left the cavity before its even entered. \n\nConfused? Youre not alone. In fact, even scientists who are familiar with this area of study are unsure about the details of Wangs experiment. And many scientists said the experiments results are still open to interpretation. \n\nWilliam Happer, a physicist at Princeton University argued that several specific problems exist with the experiment, including the fact that pulses get distorted when passed through any media other than a vacuum, or empty space. In addition, he said Wang and his colleagues performed the experiment in a way that doesnt tell the whole story, and that it can be interpreted incorrectly. "This is anything but dramatic," said Happer. "If you look at the data, theres essentially no evidence that [the beam] is going faster than the speed of light." \n\nWhats more, most scientists agree that even if such a beam can be proved speedier than light, it would probably not be able to carry any information. Such a feat could conceivably allow data to be sent back in time, thus violating laws of causality and sending quantum physics into disrepair. \n\nOthers are more optimistic as to the possible
64267
Well, if you're traveling faster than light, then the light can never be in front of you.  There would be just a big nothing, probably drive you crazy if you looked at it.  I know, I come from andromeda.  We travel through space backwards so we can see where we're going.
84170
the answer is - it depends - on a lot of things\n\nI hate to answer a question with a question but here goes ...\n\n- do you mean in theory or in practice ??? (in [einstein's relativity] theory it is possible to travel into the future - all you need to do is to go out into space for a while - the time here on earth will continue to progress at a normal pace while time for you will progress more slowly - when you come back you'll have essentially traveled into the future - not quite a time 'machine' but same effect
402996
Light travels at 186,000 miles per second, or 300,000 kilometers per second.
259168
Light travels at 670,616,629.4 miles per hour, so you multiply that by the number of hours in 35 years.\n\n35 years x 365 days/year x 24 hours/day x speed of light in miles/hour.\n\nIt's like 205,611,058,574,040 miles.
1186042
That's the problem. You can't go beyond the speed of light. It is the cosmic speed limit. But if you could, then you'll be able to travel through time, past and future.
1144162
Actually, the current theory on time travel is that the furthest back into the past you can travel with a time machine is to the point that the time machine was created.\n\nAccording to this theory, to travel back into the past, you would need to create two worm holes.  One wormhole would exist at the time that you turn on the machine and the other worm hole would be put somewhere to 'age'.  At some time in the future, something could be put into the wormhole in the future and it would come out in the past.
39733
umm...either i'd say that you must have copied the history channel, you are insane, or you perhaps found a way to go faster than the speed of light.\n\nsupposedly that would happen if you went that fast.  time slows the faster you go, and as you near the speed of light it virtually stands still, so if you go faster, then you start heading back in time.\n\ni doubt that you figured out a way though, so i'd go with you being insane if you truly believed that you could do visit ages past in person.
965397
Travelling back in time is not allowed by einstein's theory of relativity...however if you can instantly teleport youself to some faraway star,say a 101 light years away, you might be able to catch einstein receiving his nobel prize!! as stated earlier, there is no master grandfather clock that is regularly ticking away the seconds..rather that rate is adjustable...but one may zip into the future..consider an example where you are on a space-ship at a speed of 0.99990 c that is going away from the earth and coming back..in your time frame say,it takes about twenty years..using lorentz transformations, the time for your to and fro motion is close to 450 years!!
511945
try going back in time
272724
Time for the speed demon will slow down. If you reach the speed of light (theoretically impossible) time will stop, but only for you. In other words, by the time you get back to Earth, Earth will be billions of years in the future, if not much more.\n\nHowever, traveling at the speed of light is impossible. As you increase your speed, your mass increases. This was proven by Einstein by his E = mc^2 equation. Therefore, when you hit the speed of light, your mass is infinite. All the energy in the universe could not move something that had an infinite mass, obviously.
62229
Actually, yes. traveling forward in time is definately possible, but we're not sure about back. \n\nVelocity distorts time. The faster you go, the slower time goes for you. This effect is negligable unless you are going very close to the speed of light. In fact the formula is:\nt'= t/sqrt(1-v^2/c^2)\nwhere t' is the time that has passed for a stationary observer, t is the time that has passed for you, sqrt means square root and ^2 means squared. As you can notice, when v is small, since c^2 is so huge, you get a miniscule decimal, and 1 minus that number is basically as small as .999999999999999 or something very very close to one, and so t' stays basically the same as t and time is not really affected. As v gets larger(it can never be the speed of light, then the denomonator would be zero) that fraction becomes closer to 1, so when you subtract it from one, the denomonator gets smaller and smaller, meaning t gets smaller(in order for t' to remain constant) this means that time slows down for the object moving at such velocities! time slows down, so it would feel like lets sayThis formula is correct, it is part of Einstein's theory of relativity, and I have had to derive it myself from ordinary mechanics formulas. \n\nThis proves the formula:\nAccording to the same factor, length also contracts. It has been observed in certain tiny particles coming to the earth's surface. These particles have a certain lifespan before they become unstable and decay. They are also moving at a certain speed. (which is very fast; close to the speed of light.) You should simply be able to calculate v=d/t (velocity=distance/time) to find out how far they would travel. However, they somehow travel farther than that. When this calculated distance is put into that formula, we come up with the correct distance they actually travel! \n\nSo yes, as you get faster and faster, since time slows down for you, theoretically, you could be moving at these speeds for a short time and time will seem to be moving normally for you, but have years and years pass for everyone else, thus traveling forward in time.
415548
light travels at 186,000 miles per second, the earth is 25,000 miles around....\n\n25000/186000= 0.1344 seconds