Visible light waves vary in length from 380 nanometers (violet light) to 700 nanometers (red light). Wavelength of blue light The longer the wave, the less energy it transmits.

How Blue Light Hurts Sleep. Your eyes aren’t good at blocking blue light. So almost all of it passes straight through to the back of your retina, which helps your brain translate light into images.

The Blue Marble. NASA. Similar whole-Earth images had been taken as early as 1967 by satellites but the Blue Marble combines human photographer, a unique alignment of sun, spacecraft and Earth and ...

In this International Year of Light, it is particularly appropriate to review the historical concept of what is light and the controversies surrounding the extent of the visible spectrum. Today we ...

But when you combine the blue and violet light of the sky, the greenish tinge of blue and reddish tinge of violet are about the same, and wash out. So what we see is a pale blue sky.

Blue light triggers your eyes to react, especially the lens, retina, and cornea. Some research shows a link between eye damage and short-wave blue light with wavelengths between 415 and 455 ...

The light used is a natural violet or blue light, and it’s considered to be an alternative treatment. Blue light therapy can only treat areas that the light can reach.

New research finds that blue and violet light helps detect bruises in darker skin, making it easier for assault victims to seek justice. Business Insider Subscribe Newsletters ...