The family of electromagnetic waves from the high-frequency gamma rays to the relatively low-frequency radio waves forms what is called the electromagnetic spectrum.
While control of the entire electromagnetic spectrum is impossible, key portions must be commanded at the right time.
Urea is the main form in which nitrogen is excreted in mammals UV radiation invisible rays that are part of the electromagnetic spectrum.
The enemy can use his vision across a broad band of the electromagnetic spectrum.
Our century has seen the entire electromagnetic spectrum opened for business.
SOHO allows us to view the Sun in the part of the electromagnetic spectrum known as the extreme ultraviolet.
The electromagnetic spectrum includes (from longest wavelength to shortest) radio waves, microwaves, infrared, red, orange, yellow, green, blue, indigo, violet, ultraviolet, x-rays, and gamma rays.
The human eye can see only those wavelengths from red to violet; this portion of the electromagnetic spectrum is called "visible light."
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