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Dear Wiki Questioner,

Light does not actually require a material to be transmitted! It is one of the oddest (and most important!) facts of physics. Unlike sound or heat (which are propagated by particles bumping into their neighbors... who bump into their neighbors... and so on), light is created when an electric field creates a nearby magnetic field, which in turn creates a new nearby electric field (that is why light is often called electromagnetic radiation). You can think of light as two forms of energy playing leapfrog, instead of a long chain of matter passing a letter from hand to hand.

Electric fields and magnetic fields do not need any material to create each other, they tend to do it naturally. This is why light from the sun can travel through the empty vacuum of space between the sun and the earth to reach us!

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16y ago

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