Here’s how you can hack together a radio transmitter and receiver out of stuff you have at home—and explore the weirdness of ...

When it comes to electromagnetic waves, humans can really only directly perceive a very small part of the overall spectrum, which we call “visible light.” [rootkid] recently built an art piece that ...

A closed door feels absolute. Light stays in one room, darkness settles in the next, and the boundary seems obvious enough to stop thinking about. Yet the same wall that blocks the glow from your ...

Electromagnetic waves are packets of energy travelling all around us. Some of these waves have lots of energy, and some have less. We call the lowest energy electromagnetic waves radio waves. There’s ...

Over-the-air television and cellular streaming video are possible because of something you can’t see-electromagnetic radiation. Learn more about the waves that make video streaming and television ...

Visible light is just one part of the electromagnetic spectrum that astronomers use to study the universe. The James Webb Space Telescope was built to see infrared light, other space telescopes ...

One of the landmark discoveries of 19 th century physics was the realisation that electricity, magnetism and light are all connected. Experiments had already shown that the movement of electrical ...

Radio waves, longer and less energetic than visible light, give astronomers access to some of the most obscure physics in the cosmos. If you ask an astronomer to choose the single most exciting ...