- #36
dipole
- 555
- 151
The best way to view energy is to associate it with something that a particle or field carries around with it. You'd never think to talk about "pure momentum" without referencing a particle or a field, and the same is true for energy. Energy is just a bit more abstract in some ways, because it's a scalar quantity rather than a vector, and we tend to think of vectors as living in some space which we map onto the real world, whereas we don't always think of scalars in that way.
But energy, momentum, and other invariants as describe above are things which get exchanged and shuffled around when particles interact with each other. However, the fact that these things are invariant, or conserved, is a reflection of the physical laws which govern those interactions.
But energy, momentum, and other invariants as describe above are things which get exchanged and shuffled around when particles interact with each other. However, the fact that these things are invariant, or conserved, is a reflection of the physical laws which govern those interactions.