The light ray coming in at 1 o’clock reflects off the filter. ... a layered stack of transparent materials permits light arriving from only a single direction to pass through.

Blue light usually comes from the sun but also from digital screens and LED lights. Some experts believe artificial sources may be causing eye damage in humans, but animal studies are inconclusive ...

The X-rays behave as if the two sheets aren't there. (As a bonus, the intensity of light needed for this to happen is far lower than what's usually needed for atomic EIT, a boon given the energies ...

Blue light generates infrared light with an efficiency of about 180 percent. However, only three percent of the blue light gets absorbed. (Remember that it looks transparent?

Research reveals how blue light affects sleep patterns and eye health, with solutions beyond special glasses that can reduce digital eye strain by up to 50%.

The rare “blue flash” seen at sunset occurs as Earth’s atmosphere — thickest along the horizon — refracts the Sun’s light. Skip to content Introducing the all-new Astronomy.com Forum!

This year, many of us have spent a lot of time in front of computers, TVs, smartphones, and other devices that emit blue light — even more than before. Prolonged exposure to these rays has been ...

Physicists create new slow-light technique. This was tested experimentally by Farit Vagizov both at Texas A&M University and the Kazan Federal University. He used 14.4 keV gamma-ray photons from the ...

Advances in transparent solar cells mean that soon we might be able to install them into windows and greenhouses. But in the latter case, would they deprive plants of vital sunlight? To find out ...