Is there anything faster than light?

in #science7 years ago (edited)

For decades scientist have been discussing if there was anything that moved faster than light, in order to demonstrate their hipotesis they made lots of experiments with diferent particles but none seem to do it.
But actually there's something that can be faster than light, so I will make a list of the possible candidates and explain which one is the correct.

Neutrino


The neutrino is an elementary particle with half-integer spin with a mass much smaller than the other known elementary particles and is electrically neutral . Neutrinos typically pass through normal matter unimpeded and undetected because gravity is extremely weak on the subatomic scale.

Neutrinos can be created in several ways, some of there are: in a beta decay of atomic nuclei or hadrons, nuclear reactions such as the ones that occur inside a star, and supernovas, and also when accelerated particle beams or cosmic rays hit atoms.

In the past they were generally assumed to be massless so they would be propagating at the speed of light, but now it has been demonstrate that they actually have a tiny mass.
Due to their tiny mass, their predicted speed is extremely close to the speed of light in all experiments, and current detectors can't even sense the difference.
neutrinos.jpg

The universe itself


The metric expansion of space is the increase of the distance between two distant parts of the universe with time.
At the end of the early universe's inflationary period, all the matter and energy in the universe was set on an inertial trajectory and this is when the precise and regular form of the universe's expansion had its origin.

According to measurements, the universe's expansion rate was decelerating until about 5 billion years ago due to the gravitational attraction of the matter content of the universe, after which time the expansion began accelerating.
The cause of this acceleration is unknown but physicists have postulated the existence of dark energy which would explain why the universe is accelerating faster and faster in time.

The Hubble constant tells us that for every megaparsec of distance between two galaxies, the apparent speed at which the galaxies move apart from each other is aproximately 71 kilometers per second, so if you wanted to beat the speed of light those galaxies should be separated by more than 4,200 megaparsecs ( 130,000,000,000,000,000,000,000 kilometers).

And if you wonder how we can see galaxies that move away from us faster than the speed of light is because the galaxy was not moving that fast at the moment the light was emitted.
NASA-HS201427a-HubbleUltraDeepField2014-20140603.jpg

Electron


The electron is a subatomic particle with a negative elementary electric charge, it has a mass that is approximately 1/1836 that of the proton. Since an electron has charge, it has a surrounding electric field, and if you somehow managed to get small as an elctron and the electron orbited you, you would ha a magnetic field.

Due to it's small mass you would think that they would move really fast, but actually they move 100 times slower than the speed of light.
Red_Silhouette_-_Electron.svg.png

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Enlightening post - thank you @janop ! According to Einstein, nothing travels faster than light.....although that myth will soon be debunked......stay tuned / STEEM On!

Actually what Einstein said was that nothing inside the universe can move faster than light, but that doesn't include the universe itself. It's good that more people know about this.

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