electromagnetic radiation

Definition: Radiation consisting of waves which are a combination of vibrating electric and a magnetic fields that are emitted by vibration of charged particles. * The electrical and magnetic fields vibrate or oscillate at the same frequency for a given wave and propagates at a speed equal to the frequency multiplied by wavelength. * Different types of radiation are defined by their wavelength: e.g. visible light is of wavelenth 420nm-700nm.

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