How does light move in a vacuum?

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Light travels through a vacuum as a wave in an electromagnetic field, which is a fundamental force of nature. Electromagnetism, encompassing both electric and magnetic fields, is well understood but complex. The interaction of these fields allows light to propagate without a medium. For a deeper understanding, resources like the Wikipedia page on electromagnetic fields provide valuable insights. The topic of light and electromagnetism is expansive and intersects with various physics disciplines.
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How is light a wave in an electromagnetic field and and exactly is an electromagnetic field?
 
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Electromagnetism is one of the four fundamental forces of nature.
Understanding how it works gets quickly into some pretty deep stuff, but EM is largely well understood.
The Wiki page is a good intro, but it's a very big topic covering many fields of physics.
 

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