From the most distant stars in the sky to the screen in front of your face, light is everywhere. But the exact nature of ...

If you’ve ever seen strange concentric ring patterns show up when two panes of glass are pushed together, you’ve seen Newton’s rings. Most people see them as evidence of the wave nature of light.

The fundamental particle of light is both ordinary and full of surprises. What physicists refer to as photons, other people might just call light. As quanta of light, photons are the smallest possible ...