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2. Blue light spectrum - Wikipedia

   en.wikipedia.org/wiki/Blue_light_spectrum

   The blue light spectrum is an essential part of the visible spectrum with wavelengths of about 400-480 nm. [1] Blue light is primarily generated by Light-Emitting Diodes (LED) lighting and digital screens, it has now become prevalent in the world around us. [2] LED lighting creates white light by combining blue light with other wavelengths ...

3. Sunglasses - Wikipedia

   en.wikipedia.org/wiki/Sunglasses

   Hunter S. Thompson was known for wearing yellow-tinted driving glasses. When driving a vehicle, particularly at high speed, dazzling glare caused by a low Sun, or by lights reflecting off snow, puddles, other vehicles, or even the front of the vehicle, can be lethal. Sunglasses can protect against glare when driving.

4. Blue Light (counter-terrorist subunit) - Wikipedia

   en.wikipedia.org/wiki/Blue_Light_(counter...

   Blue Light was an American counter-terrorist subunit of the 5th Special Forces Group that existed into the late 1970s. [ 1] According to Colonel Charles Beckwith 's memoirs, this counter-terrorist group was formed by U.S. Army Special Forces leadership to fill an important counter-terrorism gap until Delta Force became operational.

5. AOL Mail

   mail.aol.com

   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

6. Blue laws in the United States - Wikipedia

   en.wikipedia.org/wiki/Blue_laws_in_the_United_States

   Blue laws, also known as Sunday laws, are laws that restrict or ban some or all activities on specified days (most often on Sundays in the western world), particularly to promote the observance of a day of rest. [ 1] Such laws may restrict shopping or ban sale of certain items on specific days. Blue laws are enforced in parts of the United ...

7. Rayleigh scattering - Wikipedia

   en.wikipedia.org/wiki/Rayleigh_scattering

   Rayleigh scattering causes the blue color of the daytime sky and the reddening of the Sun at sunset. Rayleigh scattering ( / ˈreɪli / RAY-lee) is the predominantly elastic scattering of light, or other electromagnetic radiation, by particles with a size much smaller than the wavelength of the radiation. For light frequencies well below the ...