Discovered more than a century ago, the electromagnetic spectrum is the basis on which our universe operates. Without it we wouldn’t be able to see, stars wouldn’t shine, and life would not exist.

While that changed with the confirmation of gravitational waves in 2016, astronomers had developed fundamental frameworks in the electromagnetic spectrum by that point.

On the other side of the spectrum, light with wavelengths slightly shorter than 380 nanometers is known as ultraviolet. Beyond that come X-rays and beyond that still come gamma rays.

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 ...

In 2024, General Stephen Whiting, the commander of U.S. Space Command opposed the sale of both the 3.1 to 3.45 GHz and the 7.0 to 8.0 GHz parts of the electromagnetic spectrum when he testified ...

WASHINGTON — The U.S. Army is working on a new tool to provide a much needed visual of the signals that command posts and units leak into the electromagnetic spectrum, possibly giving away their ...

In 2016, the Federal Communications Commission held a very special auction. For decades, a lot of the electromagnetic spectrum — the airwaves over which TV, radio and wireless signals are ...

This terahertz gap lies at the heart of the electromagnetic spectrum at 1,000 times below the frequencies of the visible light in a rainbow and 1,000 times above the radio frequencies used by cell ...