The electromagnetic spectrum is a rainbow of light waves that surround us — but we only see a small part of it. From radio waves to gamma rays, each type of light has its own properties and uses. By ...

Scientists have detected the sun emitting an extraordinary amount of gamma rays — light wavelengths known to carry the most energy of any other wavelength in the electromagnetic spectrum.

UV index is a measure of the sun's ultraviolet rays. The higher the value, the more intense the sun’s rays are.

A bipartisan group of lawmakers who co-chair the Congressional Electromagnetic Warfare Working Group said the Defense Department needs to take more of an active role in enhancing its spectrum use ...