The word "electromagnetic" refers to the combination of electricity and magnetism. It describes a type of energy or force that is made up of both electric and magnetic fields working together. Full definition
Secondly, laboratory experiments to measure the effects of electromagnetic fields on living things have proved almost impossible to replicate. (newscientist.com)
The term usually refers to optical telescopes, but there are telescopes for most of the spectrum of electromagnetic radiation and for other signal types. (sciencedaily.com)
Without that, our world is a monochromatic place bathing in electromagnetic radiation of varied intensity and wavelengths. (quintgallery.com)