The three parameters hue [color], saturation [purity or vividness], and lightness cover all colors and also form the foundation of graphical color spaces such as color wheels. In color wheels, the ...

(Nanowerk Spotlight) A new generation of lenses ('metalenses') is starting to replace bulky curved lenses with simple, flat surfaces that use nanostructures to focus light. These flat surfaces ...

Gemstones like precious opal are beautiful to look at and deceivingly complex. As you look at such gems from different angles ...

The color wheel was first developed by English mathematician and physicist Sir Isaac Newton, who discovered that white light (what we perceive as colorless daylight) is composed of a spectrum of ...