A term used to describe the entire range of electromagnetic radiation from long wavelength*, low frequency*, low energy radio waves on one end to short wavelength, high frequency, high energy gamma rays at the other. Visible light* covers a small range in the middle of the spectrum.
Visual depictions of the electromagnetic spectrum are usually shown on a log scale to allow the visualization to encompass the entire range of values which, cover many, many orders of magnitude. For example, electromagnetic energy wavelengths range from 10’s to 100’s of meters for radio waves, down to femtometers for gamma rays.
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