electromagnetic spectrum
the range of all possible frequencies of radiation
The electromagnetic spectrum is the range of all known frequencies (or wavelengths) of electromagnetic radiation. This includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. The spectrum is classified according to the energy of the waves, which increases as the frequency of the waves increases. Thus, radio waves have the lowest energy and the longest wavelengths, while gamma rays have the highest energy and the shortest wavelengths. The different types of waves in the electromagnetic spectrum have different uses and applications, such as in communication, medical imaging, and scientific research. Electromagnetic radiation travels at the speed of light, which is approximately 299,792,458 meters per second in a vacuum, and it is considered to be a fundamental force of nature.
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