As far as is known nothing with mass can travel at the speed of light.
There are 'things' that exceed light speed, such as wave guides, but mass or information cannot do so.
It is believed that the speed of light is the highest possible speed.
For light, it is.
The speed of light in water is less than the speed of light in space. Only light can travel at the speed of light.
The Fastest speed possible in the Universe is the speed of light in a vacuum exceeding 299,792,458 meters per second.
That statement is neither fact nor opinion.The fact is that no 'thing' can travel at the speed of light, so the fastestspeed possible for any 'thing' is less than the speed of light.That's the fact.
In some special substances, it was possible to slow the speed of light to just a few meters per second - incredibly slow compared to the speed of light in a vacuum.In some special substances, it was possible to slow the speed of light to just a few meters per second - incredibly slow compared to the speed of light in a vacuum.In some special substances, it was possible to slow the speed of light to just a few meters per second - incredibly slow compared to the speed of light in a vacuum.In some special substances, it was possible to slow the speed of light to just a few meters per second - incredibly slow compared to the speed of light in a vacuum.
no
It's not possible to transport matter at light speed, and you can call it anything you want to.
You can't travel at the speed of light. It might be possible, in theory, to approach it, but not quite to reach it.
The only way to travel at the speed of light is to not have any mass.
All electro magnetic radiation (including radio waves and visible light) travels at the speed of light or 300,000 km/sec
At nearly the speed of light? Yes. There's no practical way to do it, but it's obviously possible, neutrinos do so.