How is light considered “electromagnetic” radiation, What does it have to do with electromagnetism?
In: Physics
Light is made out of wiggles in the electric and magnetic fields. These are the same fields that electrically and magnetically charged things interact through.
An obvious example is through one of the ways we commonly create a certain kind of light: radio waves. If you have a metal antenna and you send electrons back and forth through it, the electrons are making an electric field that wiggles back and forth. Since they are moving, they also create a magnetic field that wiggles back and forth. This wiggling creates radio waves (a form of light), which are wiggles in the electric and magnetic fields.
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