Scientists at the University of Birmingham have designed a lens using metamaterials that can function as a convex or a concave lens, according to research published in the journal Nature ...

The odd, wavy pattern that results from viewing certain phone or computer screens through polarized glasses has led researchers to take a step toward thinner, lighter-weight lenses. Called moiré, the ...

As we learned last time when we talked about 'Light and Shadow,' shadows form because an object blocks the light. Unlike a flowing stream that curves around a rock, light always travels in a straight ...