Blue green wallpaper

blue green wallpaper

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The process of making verdigris was described in ancient times by Pliny. It was used by the romans in the murals of Pompeii, and in Celtic medieval manuscripts as early as the 5th century. It produced a blue-green which no other pigment could imitate, but it had drawbacks; it was unstable, it could not resist dampness, it did not mix well with other colors, it could ruin other colors with which it came into contact., and it was toxic. Leonardo da vinci, in his treatise on painting, warned artists not to use. It was widely used in miniature paintings in Europe and Persia in the 16th and 17th centuries. Its use largely ended in the late 19th century, when it was replaced by the safer and more stable chrome green. Viridian, also called chrome green, is a pigment made with chromium oxide dihydrate, was patented in 1859. It became popular with painters, since, unlike other synthetic greens, it was stable and not toxic.

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26 As of mid-2011, direct green laser diodes at 510 nm and 500 nm have become generally available, 27 although the price remains relatively prohibitive for widespread public use. The efficiency of these lasers (peak 3) citation needed compared to that of dpss green lasers (peak 35) citation needed may also be limiting adoption of the diodes to niche uses. Pigments, food coloring and fireworks Many minerals provide pigments which have been used in green paints and dyes over the centuries. Pigments, in this case, are minerals which reflect the color green, writers rather that emitting it through luminescent or phosphorescent qualities. The large number of green pigments makes it impossible to mention them all. Among the more notable green minerals, however is the emerald, which is colored green by trace amounts of chromium and sometimes vanadium. 28 Chromium(III) oxide (Cr2O3 is called chrome green, also called viridian or institutional green when used as a pigment. 29 For many years, the source of amazonite's color was a mystery. Widely thought to have been due to copper because copper compounds often have blue and green colors, the blue-green color is likely to be derived from small quantities of lead and water in the feldspar. 30 Copper is the source of the green color in malachite pigments, chemically known as basic copper(II) carbonate. 31 Verdigris is made by placing a plate or blade of copper, brass or bronze, slightly book warmed, into a vat of fermenting wine, leaving it there for several weeks, and then scraping off and drying the green powder that forms on the metal.

Green laser pointers outputting at 532 nm (563.5 thz) are relatively inexpensive compared to other wavelengths of the same power, and are very popular due to their good beam quality and very high apparent brightness. The most common green lasers use diode pumped solid state ( dpss ) technology to create the green light. 23 An infrared laser diode at 808 barbing nm is used to pump a crystal of neodymium- doped yttrium vanadium oxide (Nd:YVO4) or neodymium-doped yttrium aluminium garnet (Nd:YAG) and induces it to emit 281.76 thz (1064 nm). This deeper infrared light is then passed through another crystal containing potassium, titanium and phosphorus (ktp whose non-linear properties generate light at a frequency that is twice that of the incident beam (563.5 thz in this case corresponding to the wavelength of 532 nm green. 24 Other green wavelengths are also available using dpss technology ranging from 501 nm to 543 nm. 25 Green wavelengths are also available from gas lasers, including the heliumneon laser (543 nm the Argon- ion laser (514 nm) and the Krypton-ion laser (521 nm and 531 nm as well as liquid dye lasers. Green lasers have a wide variety of applications, including pointing, illumination, surgery, laser light shows, spectroscopy, interferometry, fluorescence, holography, machine vision, non-lethal weapons and bird control.

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Studies show that a assignment green environment can reduce fatigue. 21 In the subtractive color system, used in painting and color printing, green is created by a combination of yellow and blue, or yellow and cyan ; in the rgb color model, used on television and computer screens, it is one of the additive primary. On the hsv color wheel, also known as the rgb color wheel, the complement of green is magenta ; that is, a color corresponding to an equal mixture of red and blue light (one of the purples ). On a traditional color wheel, based on subtractive color, the complementary color to green is considered to be red. 22 In additive color devices such as computer displays and televisions, one of the primary light sources is typically a narrow-spectrum yellowish-green of dominant wavelength 550 nm; this "green" primary is combined with an orangish-red "red" primary and a purplish-blue "blue" primary to produce any color. A unique green (green appearing neither yellowish nor bluish) is produced on such a device by mixing light from the green primary with some light from the blue primary. Lasers Lasers emitting in the green part of the spectrum are widely available to the general public in a wide range of output powers.

The sensitivity of the dark-adapted human eye is greatest at about 507 nm, a blue-green color, while the light-adapted eye is most sensitive about 555 nm, a yellow-green; these are the peak locations of the rod and cone (scotopic and photopic, respectively) luminosity functions. 18 The perception of greenness (in opposition to redness forming one of the opponent mechanisms in human color vision ) is evoked by light which triggers the medium-wavelength M cone cells in the eye more than the long-wavelength L cones. Light which triggers this greenness response more than the yellowness or blueness of the other color opponent mechanism is called green. A green light source typically has a spectral power distribution dominated by energy with a wavelength of roughly 487570 nm. 19 Human eyes have color receptors known as cone cells, of which there are three types. In some cases, one is missing or faulty, which can cause color blindness, including the common inability to distinguish red and yellow from green, known as deuteranopia or redgreen color blindness. 20 Green is restful to the eye.

Blue, gradient, wallpaper (85 images)

blue green wallpaper

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16 In nature and culture main article: Shades of green Jade. A jade dragon from the shredded han Dynasty, china. Jade can be many different shades of green. A 10th-century celadon pot from China ( Musee guimet, paris). Celadon is a pale greyish green which takes its name from a character in the French romance Astrée by d'Urfe (1610). 17 Lime green, named for the lime fruit, inclines toward yellow. Olive or olive green.

Olive drab was the standard color. Army combat uniforms from World War ii through the vietnam War. Teal takes its name from the color around the eyes of the teal duck. In science color vision and colorimetry Green, blue and red are additive colors. All the colors you see on your computer screen are made by mixing them in different intensities. In optics, the perception of green is evoked by light having a spectrum dominated by energy with a wavelength of roughly 495570.

Citation needed In the comparative study of color terms in the world's languages, green is only found as a separate category in languages with the fully developed range of six colors (white, black, red, green, yellow, and blue or more rarely in systems with five. 12 (see distinction of green from blue) 13 These languages have introduced supplementary vocabulary to denote "green but these terms are recognizable as recent adoptions that are not in origin color terms (much like the English adjective orange being in origin not a color term. Thus, the Thai word เขียว kheīyw, besides meaning "green also means "rank" and "smelly" and holds other unpleasant associations. 14 The celtic languages had a term for "blue/green/grey proto-celtic *glasto-, which gave rise to Old Irish glas "green, grey" and to welsh glas "blue". This word is cognate with the Ancient Greek γλαυκός "bluish green contrasting with χλωρός "yellowish green" discussed above.


In modern Japanese, the term for green is, while the old term for "blue/green blue ao ) now means "blue". But in certain contexts, green is still conventionally referred to as, as in blue traffic light ao shingō ) and blue leaves aoba reflecting the absence of blue-green distinction in old Japanese (more accurately, the traditional Japanese color terminology grouped some shades of green with. The persian language is traditionally lacking a black/blue/green distinction. The persian word sabz can mean "green "black or "dark". Thus, persian erotic poetry, dark-skinned women are addressed as sabz-eh, as in phrases like sabz-eh-gandom-gun (literally " dark wheat colored or sabz-eh-malih a dark beauty. 15 Similarly, in Sudanese Arabic, dark-skinned people are described as akhḍar, the term which in Standard Arabic stands unambiguously for "green".

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11 The Chinese character (pronounced qīng in Mandarin, ao in Japanese, and thanh in Sino-vietnamese ) has a meaning that covers both blue and green ; blue and green are traditionally considered shades of " ". In more contemporary terms, they are ( lán, in Mandarin) and ( l, in Mandarin) respectively. Japanese also has two terms that refer specifically to the friend color green, ( midori, which is derived from the classical Japanese descriptive verb midoru "to be in leaf, to flourish" in reference to trees) and ( guriin, which is derived from the English word "green. However, in Japan, although the traffic lights have the same colors as other countries have, the green light is described using the same word as for blue, aoi, because green is considered a shade of aoi; similarly, green variants of certain fruits and vegetables such. Vietnamese uses a single word for both blue and green, xanh, with variants such as xanh da trời (azure, lit. "sky blue lam (blue and lục (green; also xanh lá cây, lit. "Green" in modern European languages corresponds to about 520570 nm, but many historical and non-European languages make other choices,. Using a term for the range. 450530 nm blue/green and another for.

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7 Latin with viridis also has a genuine and widely used term for "green". Related to virere "to grow" and ver "spring it gave rise to words in several Romance languages, french vert, italian verde (and English vert, verdure etc.). Ancient vandalisme Greek also had a term for yellowish, pale green χλωρός, chloros (cf. The color of chlorine cognate with χλοερός "verdant" and χλόη "the green of new growth". Thus, the languages mentioned above (Germanic, romance, slavic, Greek) have old terms for "green" which are derived from words for fresh, sprouting vegetation. However, comparative linguistics makes clear that these terms were coined independently, over the past few millennia, and there is no identifiable single Proto-Indo-european or word for "green". 9 The turkic languages also have jašɨl "green" or "yellowish green compared to a mongolian word for "meadow". 10 Languages where green and blue are one color main article: Color term In some languages, including old Chinese, thai, old Japanese, and vietnamese, the same word can mean either blue or green.

youth, spring, hope and envy. In the european Union and the United States, green is also sometimes associated with toxicity and poor health, but in China and most of Asia, its associations are very positive, as the symbol of fertility and happiness. Because of its association with nature, it is the color of the environmental movement. Political groups advocating environmental protection and social justice describe themselves as part of the Green movement, some naming themselves Green parties. This has led to similar campaigns in advertising, as companies have sold green, or environmentally friendly, products. Green is also the traditional color of safety and permission; a green light means go ahead, a green card permits permanent residence in the United States. Contents 1 Etymology and linguistic definitions 2 In science 3 In history and art 4 Symbolism and associations.1 Safety and permission.2 Nature, vivacity, and life.3 Springtime, freshness, and hope.4 youth and inexperience.5 Calm, tolerance, and the agreeable.6 jealousy and. 5 It is from a common Germanic *gronja -, which is also reflected in Old Norse grænn, old High German gruoni (but unattested in East Germanic ultimately from a pie root *ghre- "to grow and root-cognate with grass and to grow. 6 The first recorded use of the word as a color term in Old English dates.

Several minerals have a green color, including the emerald, which is colored green by its chromium content. During post-classical and early modern, europe, green was the color commonly associated with wealth, merchants, bankers and the gentry, while red was reserved for the nobility. For this reason, the costume of the. Mona lisa by, leonardo da vinci and the benches in the British. House of Commons are green while those in the. House of Lords are red. It also has a long historical tradition as the color. Ireland and of gaelic culture. It is the historic color of Islam, representing the lush vegetation of Paradise.

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This article is lined about the color. For other uses, see. Green is the color between blue and yellow on the visible spectrum. It is evoked by light which has a dominant wavelength of roughly 495570. In subtractive color systems, used in painting and color printing, it is created by a combination of yellow and blue, or yellow and cyan ; in the, rGB color model, used on television and computer screens, it is one of the additive primary colors, along. By far the largest contributor to green in nature is chlorophyll, the chemical by which plants photosynthesize and convert sunlight into chemical energy. Many creatures have adapted to their green environments by taking on a green hue themselves as camouflage.


Blue green wallpaper
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  6. Blue is the colour of light between violet and green on the visible es of blue include indigo and ultramarine, closer to violet; pure blue, without any mixture of other colours; cyan, which is midway in the spectrum between blue and green, and the other. Green is the color between blue and yellow on the visible is evoked by light which has a dominant wavelength of roughly 495570 subtractive color systems, used in painting and color printing, it is created by a combination of yellow and blue, or yellow and. The color is not as shown in the picture. There is no green under tone as implied by the pictures. The color is more sky blue or a dark powder blue with more of a grey under tone. Ceylon Batik turquoise on Almost White 8150WP-01: ceylon Batik orange on Almost White 8150WP-07: ceylon Batik jungle Green on Almost White 8150WP-05: ceylon Batik.

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