1st time electrons exceed the speed of light!


The speed of light, a limit that cannot be crossed According to Albert Einstein’s theory of relativity (1879-1955), the speed of light is an insurmountable limit that cannot be exceeded. Theoretically, nothing can travel faster than light in a vacuum. Its value has been calculated to be exactly 299,792,458 meters per second often rounded to 300,000,000 meters per second, or also 300,000 kilometers per second. On a human scale, light appears to move instantaneously. However, on the scale of the planets and the universe, light has a finite speed of 300,000 kilometers per second. The best example of this finitude of light comes from the Sun itself: the electromagnetic radiation produced by the Sun and corresponding to its light takes 8 minutes to reach the Earth. If the Sun went out, we wouldn’t notice it until 8 minutes later. It is a constant of physics that influences our knowledge of the Universe. It is valid for all objects that produce light. This means that the speed of light produced by the sun is the same as that emitted by the desk lamp bulb. To talk about the speed of light, we could also talk about the speed of propagation of energy, whatever its form. No object on Earth or in deep space can move faster than 300,000 kilometers per second. And even to get as close as possible to this speed limit, an object, whatever it is, would have to receive an infinitely large amount of energy if we refer to general relativity. (Also read: A new duality highlights flaws in the standard model) The speed of light exceeded in plasma Caption: The sun is constantly producing plasma, a stream of particles into interplanetary space. Source: muratart/Shutterstock If we consider Einstein’s theory, the speed of light is an insurmountable limit and a constant. Its speed of propagation is invariable, regardless of its frequency. However, in recent years, researchers have managed to accelerate light and slow it down to immobilization using materials such as atomic gases, that is, composed of isolated atoms of the same chemical element, whose temperature is very come down In this new study, American physicists succeeded in accelerating light past the fateful limit of 300,000 kilometers per second. They actually achieved these results by creating waves of photon waves within the same plasma. A plasma is like the solid, liquid or gaseous state, a state of matter consisting of partially or fully ionized matter. Therefore, it is a state made up of neutral particles, positive ions and electrons. From an electrical point of view, plasma is neutral. A photon travels in a vacuum at the normally impassable speed of 300,000 kilometers per second. When moving within an electric and magnetic field, the speed of the photon is limited. Physicists at the University of Rochester and Lawrence Livermore National Laboratory in California realized that by creating pulses of photons at narrow frequencies inside a plasma heated to very high temperatures, they could create “waves of waves” on which the electrons could navigate and accelerate to get there. a speed 30% higher than that of light. (Also Read: Physicists Observe Electron Swirls For The First Time!) Faster Than Light Travel: Is It Possible Or Not? Let’s be clear: it won’t be tomorrow that we’ll be creating spaceships using this technology to allow humans to travel faster than light. It will undoubtedly remain in the realm of science fiction for a long time. If that doesn’t allow us to travel faster than light, this advance in physics could make it possible to develop more powerful lasers than the ones we use today. Lasers as we know them work thanks to semiconductor materials that have the annoying tendency to deteriorate as the energy increases. By using a plasma flow, it would be possible to avoid this deterioration problem. These more powerful lasers could enable many advances in areas such as particle acceleration and nuclear fusion technology. (Also read: This atom laser can generate ‘eternal’ matter waves) Source: Goyon, MR Edwards, T. Chapman, L. Divol, N. Lemos, GJ Williams, DA Mariscal, D. Turnbull, AM Hansen and P. Michel, “Slow and fast light in plasma with mixing of optical waves,” Physical Review Letters, 126, 205001, published May 19, 2021, https://journals.aps.org/prl/abstract/10.1103/PhysRevLett . 126.20501.
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