Why does light even move? what force makes it move at insane speed?
In: 193
You’ve got a lot of answers to the light-specific part of the question, but a comment on the second part of the question:
Movement doesn’t require force. Only a *change* in movement requires force.
You’re used to associating movement with force because we live an environment that always has things slowing us down. If you’re moving along the ground, you have friction. If you are moving through the air, you have air resistance. So you need a constant force pushing you forward, in order to cancel the forces slowing you down.
If you’re out in empty space and you are flying along, you don’t have or need any force to keep moving.
There are lots of “fast” things that aren’t light, e.g. solar neutrinos that have mass, but move at *nearly* (not quite) light-speed (by our reference frame). They don’t need an active or ongoing “force” to keep moving. They just do that forever until they hit something.
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