By: April Carson
It is, however, possible for a person to travel at greater than the speed of light. It's not feasible for anything with the same weight as you or me to go faster than light.
However, for certain exotic particles that travel at twice the speed of light, traveling back in time may be possible.
So if someone were to move at twice the speed of light, they would effectively be moving backwards in time.
Of course, this is all theory and has yet to be proven experimentally. But it's an interesting thought nonetheless!
The theory of relativity, created by Albert Einstein, is one of our finest physical theories at the moment. According to this notion, anything with mass has a universal speed limit set by the speed of light.
Nothing that has mass can travel faster than light, according to relativity.
To accelerate a massy object, we must add energy. The greater speed we need for the thing to go fast, the more energy we'll require.
According to relativity, anything with weight, no matter how much it has, would require an infinite amount of energy to be accelerated to the speed of light.
All of the energy sources we are aware of are finite in one way or another: they have limits. This is one of the things that makes the idea of moving at twice the speed of light so interesting.
It's also conceivable that the Universe has a fixed amount of energy. If this were the case, there wouldn't be enough energy in the Universe to propel something with mass up to light speed.
Since we both have mass, you won't be travelling twice the speed of light for a long time.
The common speed limit is for items with a "common mass." This is the speed limit that you and I must obey.
But what if we had no mass?
If we had no mass, then according to Einstein's theory of relativity, we could travel at any speed we wanted—even faster than light!
However, there are theoretical particles known as tachyons with a type of mass called "imaginary mass."
There is no evidence that tachyons exist. However, their possibility cannot be ruled out according to relativity.
Tachyons, if they exist, must always be moving faster than the speed of light. Tachyons can't be slowed down to less than the speed of light, much as something with normal weight can't be accelerated past the speed of light.
Tachyons, according to some physicists, would be continuously traveling back in time. This is why many science fiction stories and films include tachyons because they are associated with time travel.
There are various theories that we might one day utilize tachyons to construct a time machine. However, because we don't have the ability to detect possible tachyons, this is still a distant dream at present.
We can't go faster than the speed of light, which is rather disappointing. The nearest star to us, other than the Sun, is 4.35 light-years distant. So, if we were to travel at the speed of light, it would take over four years to get there.
The most distant thing ever detected has a distance of 28 billion light-years. So, in a nutshell, the search for the entirety of the Universe is fruitless.
However, the theory of relativity does allow for "wormholes" to exist.
A wormhole is a shortcut through space that allows instant travel between any two locations. In non-wormhole terms, a star might be 4.5 light-years distant, but it may be just a few hours via a wormhole.
Wormholes would allow us to traverse enormous distances in a single lifetime if there are any genuine wormholes – allowing us to explore the Universe from end-to-end in a single existence.
Unfortunately, theoretical wormholes, like tachyons before them, remain unproven.
We can still attempt to imagine what it would be like to travel faster than light, despite the fact that we can't do so in reality.
In this manner, we are engaged in "counterfactual thinking." We're speculating about what life would be like if things were different.
There are several alternative options to explore, each with its own set of physical laws.
One option is to assume that the maximum speed limit is actually much higher than what we currently believe. In this case, someone moving at twice the speed of light would simply be traveling at the new maximum allowed speed.
While this may seem like a rather uninteresting outcome, it could have some interesting consequences. For instance, if the maximum speed limit were raised, then we would expect to see an increase in the overall energy levels of particles.
This story was originally published on Sciencealert.com.
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About the Blogger:
April Carson is the daughter of Billy Carson. She received her bachelor's degree in Social Sciences from Jacksonville University, where she was also on the Women's Basketball team. She now has a successful clothing company that specializes in organic baby clothes and other items. Take a look at their most popular fall fashions on bossbabymav.com
To read more of April's blogs, check out her website! She publishes new blogs on a daily basis, including the most helpful mommy advice and baby care tips! Follow on IG @bossbabymav
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