Why does light even move? what force makes it move at insane speed?

Question

Why does light even move? what force makes it move at insane speed?

In: 193

Answer 1

Short answer: it just does and no force makes it move

Longer answer:

First things first, light is probably the weirdest simple thing everyone deals with all the time, physically speaking. Light has no mass so it doesn’t need a force to propel it. It doesn’t speed up or slow down. If it exists it travels at the speed of light. It’s easier in this case to think of it as a wave, like on a string or in water. So just like nothing pushes those other waves along after they’re made in their string/water, nothing pushes that light along. They just travel in their speed set by whatever medium they’re traveling through