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

Ultraviolet wavelengths, which range from 10 to 380 nanometers, are smaller and more energetic than those on the visible light spectrum. (Image credit: Ali Damouh/Science Photo Library via Getty ...

What is ultraviolet light, and where does it come from? Learn how UV radiation is classified, measured, and used in medicine, manufacturing, astronomy, and daily life, plus how to stay safe.

That’s why we cannot make out UV or infrared light—UV wavelengths are too short for our cones to detect, and infrared wavelengths are too long. Cone cells come in three flavors: ...

Violet light, at wavelengths less than 450 nm, is associated with a higher degree of light scatter and may have phototoxic effects that increase the risk for retinal disease.

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.

Visible light wavelengths appear between 400 and 700 nanometers on the electromagnetic spectrum. In comparison, ... Blue light is close to ultraviolet light in wavelength.

But when the waves get shorter still, the light becomes invisible and is known as ultraviolet (UV). There are different kinds of UV light, depending on its precise wavelength between 10nm and 400nm.