Not necessarily their purpose. Just what is happening that is creating the force and how does this force interact between fields?
For example, I get how heat transfer works. Conduction and convection make sense to me because two pieces of matter interact with each other and transfer energy. Cool.
I know it’s not a particle so I guess it’s a wave? A wave of what?
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You understand how electricity and it’s forces work, magnetism is just another manifestation of the same force. The electromagnetic force is one of the 4 fundamental forces of the universe. You can’t have one without the other. Magnetism just comes into play when electric charges move. As for why, it’s because the universe is built that way.
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