General and Special Relativity
Speed of Light

# Can you travel into future or past by travelling at speed of light?

012

###### 2013-11-29 16:12:07

In theory, time travel can be accomplished by traveling the speed of light. However, the theory also states that travel at that speed is not possible.

๐ฆ
0
๐คจ
0
๐ฎ
0
๐
0

## Related Questions

Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.Not in the near future. Other galaxies are hundreds of thousands, or millions, of light-years away; travelling at the speed of light, it would thus take millions of years to travel to most galaxies; travelling at a lower speed would, of course, take longer.

No. By travelling FASTER than the speed of light, this might in theory let you travel back in time. However, it seems likely that neither travelling faster than the speed of light nor time travel is possible. Also note that a human being cannot travel at the speed of light; with a super-spaceship, we might in theory approach this speed, but not quite reach it. Only particles with "zero rest mass" (such as photons or gravitons) can travel at the speed of light (and, in a vacuum, they can ONLY travel at the speed of light).

Nothing can travel at the speed of light. Even in the future. You should also watch Stephen Hawking series.

Indeed, time travel, and travelling faster than the speed of light, are intimately related in the Special Theory of Relativity. Looking at the situation from the other side, if it were possible to travel faster than light, then from some point of view, you would be travelling backwards in time. For more details, read about the definition of "simultaneity" in the Special Theory of Relativity.Probably none of the two is possible - travelling backwards in time, and travelling faster than light.Indeed, time travel, and travelling faster than the speed of light, are intimately related in the Special Theory of Relativity. Looking at the situation from the other side, if it were possible to travel faster than light, then from some point of view, you would be travelling backwards in time. For more details, read about the definition of "simultaneity" in the Special Theory of Relativity.Probably none of the two is possible - travelling backwards in time, and travelling faster than light.Indeed, time travel, and travelling faster than the speed of light, are intimately related in the Special Theory of Relativity. Looking at the situation from the other side, if it were possible to travel faster than light, then from some point of view, you would be travelling backwards in time. For more details, read about the definition of "simultaneity" in the Special Theory of Relativity.Probably none of the two is possible - travelling backwards in time, and travelling faster than light.Indeed, time travel, and travelling faster than the speed of light, are intimately related in the Special Theory of Relativity. Looking at the situation from the other side, if it were possible to travel faster than light, then from some point of view, you would be travelling backwards in time. For more details, read about the definition of "simultaneity" in the Special Theory of Relativity.Probably none of the two is possible - travelling backwards in time, and travelling faster than light.

To travel a light-year in a decade would mean travelling at 1/10 the speed of light [if you disregard time needed for acceleration and deceleration. See discussion]. Current technology is nowhere near achieving this speed; while there are some speculations about future technology, for now, this is just that: speculation. It is hard to tell whether it will be possible in the foreseeable future.

You had better travel near the speed of light or you will not see much of the universe. Unfortunately travelling near the speed is not yet possible, so you are out of luck.

To travel at the speed of light it would take 100'000 years to cross the milky way

It would take you just over 5 years 9 months to travel 56,000,000,000,000 kilometers at the Speed of light, 299,792,458 meters per second.

Theoretically, it is possible to travel through time: by travelling at a great speed. But the speed at which you would have to travel would be faster than the speed of light, and would therefore kill every known living being.

Travelling faster than the speed of light is not possible, therefore no galaxies have travelled or are travelling faster than the speed of light.

A man can't travel at the speed of light.A man can't travel at the speed of light.A man can't travel at the speed of light.A man can't travel at the speed of light.

Well, it takes 2,700 years for light to travel that far. Anything travelling at half light-speed would take 5,400 years. At 1/4 light-speed, it would take 10,800 years.

You would have to be travelling faster than the speed of light in order to do this. And, theoretically speaking, this would be impossible to do.However, if you were possible to travel faster than the speed of light, you would need to be travelling 1.25x the speed of light (which is about 3.75 x 108 m/s2).

The speed of light Changes a Little depending on what it's travelling through. Its fastest in vacuum and slower in glass or water.

Photons begin their existence travelling at the speed of light, they do not "acquire" this speed.

Digital signals travelling along fibre-optic cable travel at 186,282 miles per second (the speed of light) !

There is no way to travel at the speed of light.

If you travel near the speed of light, then, from the point of view of somebody who is NOT travelling with you (say, someone who stays behind on Earth):Time will pass slower for you.Distances for you will be shorter (in the direction of travel).Your mass will increase.

No, because according to Einstein, there is nothing that can travel faster than the speed of light. For example, if there is a headlight on the front of a train that is travelling 60 km/h, the light coming from the front of the train is still only going at the speed of light despite the speed of the train.

That will of course depend on the speed. With current technology, it isn't possible to travel there. The center of the Milky Way is at a distance of about 26,000 light-years; travelling at the speed of light, it would take 26,000 years to get there. Travelling at 1% of the speed of light, it would take 2.6 million years. Etc.

The speed of light in water is less than the speed of light in space. Only light can travel at the speed of light.

The unit of distance called "light year" is equal to about 9.46 x 105 m, and is, according to its name, the distance covered by the light during a period of one Earth year. Therefore, it would take 4 years to travel 4 light years, or about 1461 days. According to who - the person travelling or some one just watching from a fixed point. For the person travelling - no time elapses, as they are travelling at the speed of light.

We will land in past.when our speed is slower than light there will be some time in clock ,when our speed is same of light than the in click will stop for us, But when our speed is faster than light the clock will start moving reverse.

###### AstronomySciencePhysicsPlanetary ScienceTravel & PlacesSpace Travel and ExplorationSpeed of LightTelephonesGalaxies

Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.