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This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
Single-photon source; Skyglow; Solar transition region; Sonoluminescence; Star; Starlight; Lists of stars; List of brightest natural objects in the sky; List of brightest stars; Stellar corona; STEVE; Sun; Sunlight; Supernova; List of supernova remnants; Swedish torch; Synchrotron light source
1962 Nick Holonyak Jr. develops the first practical visible-spectrum (red) light-emitting diode. 1963 Kurt Schmidt invents the first high pressure sodium-vapor lamp. [17] 1972 M. George Craford invents the first yellow light-emitting diode. 1972 Herbert Paul Maruska and Jacques Pankove create the first violet light-emitting diode.
A common thermal light source in history is the glowing solid particles in flames, but these also emit most of their radiation in the infrared and only a fraction in the visible spectrum. The peak of the black-body spectrum is in the deep infrared, at about 10 micrometre wavelength, for relatively cool objects like human beings.
Publication number 117, Radio Navigational Aids, is the primary source for details on radio navigational aids. The List of Lights does not include information on lighted buoys inside harbors. It does include certain aeronautical lights situated near the coast; however, these lights are not designed for marine navigation and are subject to ...
Boston Light, the oldest light station and second oldest lighthouse structure in the US Charleston Light, the last manned lighthouse built on shore in the United States. This is a list of lighthouses in the United States. The United States has had approximately a thousand lights as well as light towers, range lights, and pier head lights.
Adds resin to the known list of "electrics". 1675 – Isaac Newton delivers his theory of light; 1676 – Ole Rømer proves that speed of light is finite, by observing Jupiter's moons; 1678 – Christiaan Huygens states his principle of wavefront sources and demonstrates the refraction and diffraction of light rays.
Green electroluminescent source [5] 10 2: 55 cd/m 2: Standard SMPTE cinema screen luminance [10] 80 cd/m 2: Monitor white in the sRGB reference viewing environment 250 cd/m 2: Peak luminance of a typical LCD monitor [11] [12] 10 3: kcd/m 2: 700 cd/m 2: Typical photographic scene on overcast day [7] [9] [12] 2 kcd/m 2: Average cloudy sky [5] 2.5 ...