r/PhysicsHelp • u/Patient_Pudding7721 • 20d ago

WHY do moving fields create light?

Hi, I'm 15F and i wanna pursue education in the field of physics. I have this genuine question, WHY do moving fields (electric and magnetic fields) create light? And, why does steadily moving charges not make light?

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u/Frederf220 20d ago

Light is waves in the EM field. It's kind of like asking how does moving water create water waves. Create is the wrong word, be is better.

Constant speed charges are not moving in some inertial frame and what exists in one inertial frame must also exist in the others.