When people say “nothing can travel faster than the speed of light, information cannot travel faster than the speed of light”
What do we mean by information? and there can be non-information? how it would like?
In: Physics
As your speed increases. So does your mass so it’s not possible for anything other than light to reach light speed. Information I assume you mean things like quark structure and universal constants, such as how uud is always a proton. Quarks have mass so cant light speed
The speed of light in this case is better called the speed of causality. So for any 2 objects to be causally connected they cant be further apart than over a given time period than light could travel in that given time period. In other words you cant have a cause and effect relationship between objects that haven’t had time to communicate with each other. If you were on the moon and I shined a laser at you, you couldn’t know that I have done so until the light reaches you.
Information can be inferred as anything that can have this causal relationship.
According to our current understanding of physics, there are several [elementary particles](https://en.wikipedia.org/wiki/Elementary_particle), and four [fundamental forces](https://en.wikipedia.org/wiki/Fundamental_interaction) that cause these particles to interact.
So, “information” from a physics point of view is the “force” or “forces” caused by one particle being felt by other particles. As an example, all the material in the Sun creates gravity, and electromagnetic radiation (light), and that’s how we know the Sun is there. The Earth “feels” the gravity and light too. The strong and weak nuclear forces don’t have the range to be “felt” by the Earth.
So “information can’t travel faster than the speed of light” means that the effects of any particle cannot be felt (at distance) faster than the speed of light. No matter which force they’re creating, gravity, electromagnetism, nuclear, or any other forces that maybe we haven’t discovered yet, who knows, none of these forces can propagate out from that particle that creates them, faster than the speed of light.
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