Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 23

electromagnetic radiation - Electromagnetic spectrum, Derivation

velocity waves light

Oscillating electric and magnetic fields which propagate together through empty space as a radiated wave; velocity c, the velocity of light. They include radio waves, light, and X-rays. No ether is required for the propagation of electromagnetic waves, which exhibit particle-like properties, more noticeable for higher frequencies, consistent with quantum theory.

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