High-energy neutrino, so lightweight that they behave like they’re massless, and as we know a basic rule of physics: Massless particles travel at the speed of light. Looking at the landing times of a neutrino and a related blast of high-energy light emitted from a brilliant, flaring cosmic system demonstrated that the neutrino and light differed in speed by not as much as a billionth of a percent, physicists report in a paper posted July 13 at arXiv.org.
Massless particles — including the particles of light known as photons — reliably move around 300,000 kilometers for every second, while massive particles move all the more gradually. In spite of the fact that neutrinos have mass, their weight is infinitesimal to the point that high-energy neutrinos travel at a rate successfully indistinct from that of light.
A few hypotheses suggest that a “spacetime froth” may moderate particles of high energies. The thought is that spacetime on to a great degree little scales isn’t smooth, yet frothy. Thus, high-energy particles could get impeded, as though traveling through molasses.
That impact could cause a noteworthy distinction between the speeds of the neutrino and the related light, which would build up with a deferral over the 4-billion-light-year trip from the neutrino’s home galaxy to Earth. Be that as it may, since the flare of light was spotted around an indistinguishable time from the neutrino, there’s no confirmation for such an inconsistency.