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  2. What Blue Light Glasses Do and Don’t Do - AOL

    www.aol.com/blue-light-glasses-don-t-120300851.html

    Blue Light Facts. Research conclusions about blue light–filtering glasses include: While blue light has the most energy of all visible colors, the amount emitted from screen time is low. There ...

  3. 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]

  4. Light - Wikipedia

    en.wikipedia.org/wiki/Light

    Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1] ... Blue-white thermal emission is not often seen, ...

  5. Blue laser - Wikipedia

    en.wikipedia.org/wiki/Blue_laser

    A blue laser emits electromagnetic radiation with a wavelength between 400 and 500 nanometers, which the human eye sees in the visible spectrum as blue or violet. [1] Blue lasers can be produced by: direct, inorganic diode semiconductor lasers based on quantum wells of gallium(III) nitride at 380-417nm [2] [3] or indium gallium nitride at 450 nm

  6. Blue law - Wikipedia

    en.wikipedia.org/wiki/Blue_law

    Blue laws (also known as Sunday laws, Sunday trade laws, and Sunday closing laws) are laws restricting or banning certain activities on specified days, ...

  7. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Red and blue emergency lights on a fire engine in Canberra, Australia. Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users.

  8. Diffuse sky radiation - Wikipedia

    en.wikipedia.org/wiki/Diffuse_sky_radiation

    The blue sky spectrum contains light at all visible wavelengths with a broad maximum around 450–485 nm, the wavelengths of the color blue. Diffuse sky radiation is solar radiation reaching the Earth 's surface after having been scattered from the direct solar beam by molecules or particulates in the atmosphere .

  9. Blue Light - Wikipedia

    en.wikipedia.org/wiki/Blue_Light

    Blue Light (counter-terrorist subunit), a 1970s US counter-terrorist subunit of the 5th Special Forces Group Blue lights, also known as blues and twos services, British emergency services

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