Question

Is there anything faster than the speed of light.

Answer 1

Nothing in the actual world moves faster than the speed of light, according to Einstein's theory of relativity and all experiments conducted to date. According to Einstein's special theory of relativity, only particles with zero rest mass are capable of travelling at the speed of light. As a result, it is thought that exceeding the speed of light is impossible.

Complete answer:
It is impossible to accelerate an item to the speed of light, or for a large object to travel at the speed of light, according to special relativity. It is possible, however, that an item exists that always travels faster than light. Tachyons or tachyonic particles are hypothesised elementary particles having this characteristic. Attempts to quantify them failed to generate faster-than-light particles, but did show that their existence causes instability. Several theorists have proposed that the neutrino has a tachyonic character, whereas others have dismissed the idea.
A tachyon, also known as a tachyonic particle, is a hypothetical particle that travels faster than light at all times. The majority of scientists think that faster-than-light particles cannot exist because they violate established physical principles. If such particles existed and could convey communications faster than light, they would break causality, leading to logical dilemmas like the grandfather paradox, according to Einstein's theory of relativity. Tachyons would also have the odd feature of growing in speed as their energy diminishes, and slowing down to the speed of light would take infinite energy. There has been no experimental evidence for the existence of such particles.

Note:
A strange property of tachyons is that, unlike regular particles, their speed rises as their energy diminishes. When v approaches infinity, E approaches zero in particular. As a result, just as bradyons are banned from breaking the light-speed barrier, tachyons are forbidden from slowing down to below c, since reaching the barrier from either above or below requires limitless energy. Special relativity indicates that, if faster-than-light particles exist, they might be utilised to communicate backwards in time, as Albert Einstein, Tolman, and others have recognised.