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Why do electromagnetic waves travel through empty space without a material medium?

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Understand how the concept of touch changes with the presence of electrons between two objects — electromagnetism Learn how the presence of electrons between two objects changes the notion of touch.

Electromagnetic waves do not require a material medium to travel because they are not physical displacements of matter, but rather propagating oscillations of electric fields and magnetic fields.12

These fields possess an independent existence in space. According to the laws of electromagnetism formulated by James Clerk Maxwell, a time-varying electric field generates a magnetic field, and a time-varying magnetic field generates an electric field. This mutual interaction allows the electromagnetic wave to be self-propagating; once generated by an oscillating charge, the fields continuously regenerate one another as they travel through space at the speed of light.3415

Unlike mechanical waves—such as sound—which rely on the physical movement of particles within a medium, electromagnetic radiation propagates through the vacuum of space as a unified electromagnetic field. Historical experiments, such as the Michelson-Morley experiment, ultimately confirmed that no hypothetical medium, or "ether," is necessary for this propagation.314