The electromagnetic spectrum is the collective term for all kno... - dofaq.co
electromagnetic spectrum

The electromagnetic spectrum is the collective term for all kno...

wikipedia - 06 Oct 2015
The electromagnetic spectrum is the collective term for all known frequencies and their linked wavelengths of the known photons (electromagnetic radiation). The "electromagnetic spectrum" of an object has a different meaning, and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.[citation needed]

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