So a rocket moves by having a big explosion push it. A car moves by little tiny explosions moving things and then mechanics to get it to the wheels, how does light power itself to move? especially with how fast it moves?
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atoms are made up of electrons and protons. These are charged particles, which mean they have an electric field around it. If you jiggle an electron it’ll jiggle its electric field. A jiggling electric field causes a jiggling magnetic field. But also a jiggling magnetic field causes a jiggling electric field.
So when you jiggle an electron, that causes a jiggling electric field, which causes a jiggling magnetic field, which causes a jiggling electric field…. on an on. This is an electromagnetic wave, otherwise known as light. The electron is pushed back by the electric and magnetic field of the wave.
The energy within the electromagnetic wave came from the jiggling u did to the electron. the wave doesnt need to keep powering itself to keep going since it is just the the interreaction of electric and magnetic fields that it itself are constantly creating. And if theres nothing to stop it, itl just keep going and never slow down.
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