Don’t waves need a medium to travel through? Isn’t space just essentially empty? I know they’re electromagnetic waves, but what does that mean essentially?
Edit: Thanks for the response guys. From your response I’ve realised there’s no way to explain to a 5 year old how light works!
In: Physics
Depending how interested you are in this topic, check out The Great Courses: relativity and the quantum revolution. It’s a great intro to physics for non-physicists
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