As a result, purple and magenta are known as "nonspectral" colors, because they don't really exist as actual electromagnetic ...

Visible light is only a small part of the electromagnetic spectrum, but some people see more of it than others. Let's take a ...

For thousands of years, humans were looking up at the star-studded night sky using just their eyes sensitive to the optical wavelength of the electromagnetic spectrum. The first telescopes ...

What is ultraviolet light, and where does it come from? Learn how UV radiation is classified, measured, and used in medicine, ...

Why Trust Us? The human eye does not actually see purple, as purple is not a color on the visual spectrum. Purple is a combination of wavelengths from opposite extremes of the spectrum ...

Researchers used powerful XFELs to trigger strong inner-shell lasing, producing attosecond hard X-ray pulses. Filamentation ...