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| e·lec·tro·mag·net·ic ra·di·a·tion |
noun |
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| Definition: |
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radiation such as X-rays, light, microwaves: radiation in the form of electromagnetic waves such as gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and radio waves. The radiation has magnetic and electric fields that are perpendicular to each other and to the direction of propagation, and travels without a supporting medium.
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