Which thing is faster than light?
Tachyons are hypothetical particles that travel faster than light. According to Einstein’s special theory of relativity – and according to experiment so far – in our ‘real’ world, particles can never travel faster than light.
Can we ever travel at light speed?
As objects move faster and closer to the speed of light, they gain mass. So no, you can’t travel at the speed of light. Nothing with any mass can, not even subatomic particles. Light has no mass, so in clear space it is always traveling at the “speed of light” by definition.
Is it possible to exceed the speed of light?
According to Einstein’s theory of special relativity, published in 1905, nothing can exceed the speed of light. By the time an object reached the speed of light, Einstein calculated, its mass would be infinite, and so would the amount of energy required to increase its speed. To go beyond the infinite is impossible.