The world is awash with the color purple — lavender flowers, amethyst gemstones, plums, eggplants and purple emperor ...

Ultraviolet has very short and energetic wavelengths that are shorter than violet on the visible spectrum. But can people see UV? When you purchase through links on our site, we may earn an ...

In fact, violet (along with the rest of the colors in a naturally occurring rainbow) has something purple doesn’t—its own wavelength of light. Anyone who ever ended up with a sunburn knows ...

Visible' light-emission device technology is reaching its maturity, and many groups have shifted their research focus towards the shorter-wavelength UV devices. This interest is fuelled by the ...

Because UV light with wavelengths less than 360 nm does not penetrate the eye’s cornea, this suggests that our eyes sense and adapt to the deep violet visible wavelengths in natural light.

It’s called “far-UVC,” a type of ultraviolet light, at wavelengths of roughly 200 to 235 nanometers, that can kill the vast majority of airborne pathogens it targets, without damaging human ...

Violet is a single wavelength close to 380 nm, at the limit of what our eyes can see. If the sun produces white light, why do we see any colors in the sky at all? The reason is that when an ...

Biofluorescent creatures generate their glow with structures that absorb high-energy wavelengths of light, such as UV, violet or blue, then emit the light in a lower-energy wavelength. Researchers ...