4 ms·
This is very misleading. In fact, neutrinos are not going faster than speed of light (c), they are going faster than photons that are emitted from the supernova
by saberdancer 7y ago
This is very misleading. In fact, neutrinos are not going faster than speed of light (c), they are going faster than photons that are emitted from the supernova.
Not just that, but lights when it passes through a medium slows down depending on it's refractive index (speed of light in water is about 225 000km/h while in vacuum it's 300 000km/h). This is important distinction as recently we had an uproar when it looked like neutrinos are slightly faster than c (in the end, it was a measurement error).
You can observe effects of particles going faster than speed of light in a medium if you look at photographs of Cherenkov radiation.
- Erlich_Bachman 7y agoThat comment never wrote that neutrinos were faster than the speed of light?
- pavs 7y agoNo, but he did write "There is at least one known exception", the misleading part.
- Lukas_Skywalker 7y agoI'm sure it's a typo, but for others: speed of light is 300'000 m/s in vacuum, not km/h.
- Cyberspy 7y agoIt's not a typo - it's 299,792,458 m/s - approx 300,000,000 m/s or 300,000 km/s
- lmilcin 7y agoThe correct way to say it is that the speed of light is the speed of causality only in vacuum. In any medium the speed of light is slower but the causality or other fields (for example gravity field) that are not impeded by matter can and will propagate faster than the speed of light.
- blueprint 7y agoWhere does there exist a vacuum? How does a particle or its environment measure the particle's traversal of a truly empty space?
- tromp 7y ago> in vacuum it's 300 000km/h 300 000 km per second
- mcdevilkiller 7y agoAre you sure it's km/s? :D