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Blue is a primary color across all models of color space. It is the color of the ocean and the sky; it often symbolizes serenity, stability, inspiration, or wisdom. [9] It can be a calming color, and symbolize reliability. [10]
On May 19, 1902, Cleveland became one of the first cities in the country to require motorists to display government-issued registration numbers on their vehicles. [11] [12] In the following years, various local governments in Ohio issued standard metal plates of varying design or numerals (to be mounted on a dark background), including:
This characteristic blue-violet cyanosis in expiring patients led to the name 'purple death'. [ 23 ] [ 24 ] [ 25 ] The Aldershot physicians later wrote in The Lancet , "the influenza pneumococcal purulent bronchitis we and others described in 1916 and 1917 is fundamentally the same condition as the influenza of this present pandemic."
A meteoroid shown entering the atmosphere, causing a visible meteor and hitting the Earth's surface, becoming a meteorite. A meteoroid (/ ˈ m iː t i ə r ɔɪ d / MEE-tee-ə-royd) [1] is a small rocky or metallic body in outer space.
U.S. Frequency Allocation Chart – Covering the range 3 kHz to 300 GHz (from Department of Commerce) UK frequency allocation table (from Ofcom, which inherited the Radiocommunications Agency's duties, pdf format) Flash EM Spectrum Presentation / Tool – Very complete and customizable. Poster "Electromagnetic Radiation Spectrum" (992 kB)
Rayleigh scattering of sunlight by Earth's atmosphere causes the blue color of the sky, which tends to scatter blue light more than red light. Some daylight in the early morning and late afternoon (the golden hours ) has a lower ("warmer") color temperature due to increased scattering of shorter-wavelength sunlight by atmospheric particulates ...
A rainbow is a decomposition of white light into all of the spectral colors. Laser beams are monochromatic light, thereby exhibiting spectral colors. A spectral color is a color that is evoked by monochromatic light, i.e. either a spectral line with a single wavelength or frequency of light in the visible spectrum, or a relatively narrow spectral band (e.g. lasers).
"Lavender's Blue" (also called "Lavender Blue") is an English folk song and nursery rhyme from the 17th century. Its Roud Folk Song Index number is 3483. It has been recorded in various forms and some pop versions have been hits in the U.S. and U.K. charts.