If you have ever seen objects 'glow' under a black light, you're familiar with fluorescence. But have you ever wondered why some materials fluoresce while others don't? Reactions explains how ...

There’s no such thing as a complete vacuum. Even in the cosmic void between galaxies, there’s an estimated density of about one hydrogen or helium atom per cubic meter. But these estimates are largely ...

Researchers at the ArQuS Laboratory of the University of Trieste (Italy) and the National Institute of Optics of the Italian ...