The double-slit experiment is one of the most famous experiments in physics and definitely one of the weirdest. It demonstrates that matter and energy (such as light) can exhibit both wave and ...

What is the purpose of light? How does light work? Why does light exist? This video explores the longstanding debate over whether light is composed of particles or waves. Albert Einstein demonstrated ...

Slowing down light is not as easy as it sounds. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The phenomenon of light slowing down as it passes ...

The ability to glow is a mesmerizing trait – but some things can only do so under certain circumstances, for example, having a black light shone on them. So what is a black light, and how do they work ...

The aurora borealis is usually visible only way up north, but over the past 18 months, shimmering curtains of pink and green light have filled night skies across much of North America, at times ...