Технологии

https://www.sciencealert.com/physicists-broke-the-speed-of-light-with-pulses-inside-hot-plasma

By stripping electrons away from a stream of hydrogen and helium ions with a laser, the researchers were able to change the group velocity of light pulses sent through them by a second light source, putting the brakes on or streamlining them by adjusting the gas's ratio and forcing the pulse's features to change shape.