The only thing that travels at the speed of light, is light. Light is also said to have no mass, therefore the only way for something to travel at the speed of light is for it to have no mass.
No it doesn't. The scenario is completely unrealistic anyway, because if it has any mass at any slower speed, then at the speed of light its mass is infinite.
According to Einstein, no body travel in the speed of light. He gave an relationship between the mass and speed (relative mass) in his theory of relativity. According to that, if a body travels in a speed of light, then the mass of the body must be infinite. Which is practically impossible. space-time travel is just a science fiction. it may become true in future. but it is impossible right now.
The mass of a body increases as its speed increases. A body that has any masswhen it's not traveling at the speed of light would have infinite mass when it istraveling at that speed. So its kinetic energy would be infinite, and anything it hit ...whether a bird, a plane, the Earth, or a star ... would be totally blasted to smithereensthat were too small to detect.Fortunately, a body that has any mass when it's not traveling at the speed oflight can never travel at that speed.
Neutrinos travel so close to the speed of light we were unsure for awhile whether or not they had a rest mass.
It is not possible for a body to travel faster than the speed of light. It isn't simply a matter of technological insufficiency; it's a fundamental physical limit. With the expenditure of sufficient energy, it is theoritically possible to approach the speed of light, but light speed cannot be achieved by any body with mass, hence neither can it be exceeded. I'm so bored
Any massless "thing" like a photon and MAYBE a neutrino. NOTHING with mass can travel at the speed of light. Photons travel at the speed of light. The entire electromagnetic spectrum travels at the speed of light.
I call it a 'photon'.By the way, the photon has zero rest mass, but when it travels at the speed of light ...which it always does ... it has some mass.
No particle can reach the speed of light. Mass increases with speed, and the particle would become infinitely massive as it came closer to the speed of light.
No but the leader that travels from the cloud to the ground travels at about 60 000 m/s. Light travels at 300 000 000 m/s. Note that the bright flash of lightning occurs on the return stoke and travels from the ground up to the cloud. Read the article on lightning at Wikipedia.org, 'The World's Encyclopedia'. The link is in the related links below.
A solid mass won't travel at the speed of light.A solid mass of any speed can block rays of light from the Sun, if it happens to pass in front of the Sun.A solid mass won't travel at the speed of light.A solid mass of any speed can block rays of light from the Sun, if it happens to pass in front of the Sun.A solid mass won't travel at the speed of light.A solid mass of any speed can block rays of light from the Sun, if it happens to pass in front of the Sun.A solid mass won't travel at the speed of light.A solid mass of any speed can block rays of light from the Sun, if it happens to pass in front of the Sun.
"Almost" seems to be the key word in this question. The photon travels always at the speed of light, and can travel at no other speed in the medium through which it travels. So "almost" does not fit the photon. Certain subatomic particles can be accelerated to near light speed: neutrons and protons are accelerated to near-c in particle accelerators. But they have mass, and nothing with mass can ever be accelerated to 100 percent of the speed of light, so they can only approach it, if enough energy is applied.
Nothing with mass can travel at the speed of light, though it can get close. Nuclear fission (the splitting of atoms) does generate electromagnetic radiation which travels at the speed of light, but light is a form of electromagnetic radiation anyway.