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 ...

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

EGLIN AFB — Eglin Air Force Base is the home, at least for now, of a first-of-its-kind Air Force wing working in the electromagnetic spectrum, which stretches from radio waves to visible light and ...

What did Ohioans see Wednesday night, and how does the weather play a major role in illuminating the sky during the fall?

Sascha Hein gets to the bottom of a misconception: neither light nor objects are actually coloured – colour only arises in ...

Did you know you've been cooking your food with light? Most of us have a microwave oven in our kitchens, and that's exactly what they do. When you press start, a device called a magnetron emits a ...

When you look at the night sky, do you ever wonder what's going on out there? On a clear night with a dark sky, if moonlight doesn't wash it out, sometimes you can see the arc of the Milky Way. The ...