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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, ...
A Blue Light Station is a combined emergency telephone and emergency power-off switch in rapid transit stations and other points along electrified railways. They are common in the United States and Canada. [citation needed] The location of such a device is usually indicated by a blue light
Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope. A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave ultraviolet light and very little visible light.
Lasers emitting wavelengths below 445 nm appear violet, but are nonetheless also called blue lasers. Violet light's 405 nm short wavelength, on the visible spectrum, causes fluorescence in some chemicals, like radiation in the ultraviolet ("black light") spectrum (wavelengths less than 400 nm).
The combination of that yellow with remaining blue light appears white to the eye. Using different phosphors produces green and red light through fluorescence. The resulting mixture of red, green and blue is perceived as white light, with improved color rendering compared to wavelengths from the blue LED/YAG phosphor combination. [76]
Hyperion, Titan of light; sometimes conflated with his son Helios; Lampetia, goddess of light, and one of the Heliades or daughters of Helios , god of the Sun, and of the nymph Neera . Theia, Titaness of sight and the shining light of the clear blue sky. She is the consort of Hyperion and mother of Helios, Selene, and Eos.
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