Wiktionary
n. (plural of electromagnetic spectrum English)
Usage examples of "electromagnetic spectra".
He kept practicing as he carefully melted down his ship (though it was transparent to most electromagnetic spectra, it might still cause comment if found) and by the time he made his way into the nearby city, he was able to communicate fairly well.
Using other sensor arrays, I scan across a wide band of visual, audio, and electromagnetic spectra, looking for anything out of the ordinary.
In this case, his leisure activity of restoring ancient audio equipment had proved to be of value: he had done a rough analysis of the electromagnetic spectra surrounding them in the wormhole, and had found a narrow band that seemed to reflect along the limits of the wormhole’.
Carrying exchange forces across the interface between the tachyonic and electromagnetic spectra, it is responsible for such telurgic phenomena as telepathy, telekinesis, and teleportation.