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.
No, it is not possible to slow down the speed of light in a vacuum.
For light, it is.
No, it is not possible to travel at the speed of light in water. Light travels at a slower speed in water compared to its speed in a vacuum, which is about 299,792 kilometers per second. The speed of light in water is approximately 225,000 kilometers per second.
The Fastest speed possible in the Universe is the speed of light in a vacuum exceeding 299,792,458 meters per second.
no
Yes, according to our current understanding of physics, the speed of light in a vacuum is the fastest speed at which energy, matter, and information can travel. Any object with mass that approaches the speed of light would require an infinite amount of energy to accelerate further.
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.
Speed of light is possible within a sphere.whereas controlled properties of the sphere can be introduced with technoligy in the year 2027.
At nearly the speed of light? Yes. There's no practical way to do it, but it's obviously possible, neutrinos do so.
According to the theory of relativity, it is not possible for anything with mass to travel faster than the speed of light in a vacuum.