https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relati...
Besides it being a basic relation for relativity, there's also an entire "parallel" quantum mechanics for particles that have too much energy at the momentum component based on it.
https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relati...
Besides it being a basic relation for relativity, there's also an entire "parallel" quantum mechanics for particles that have too much energy at the momentum component based on it.