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In optics, violet is a spectral color: It refers to the color of any different single wavelength of light on the short wavelength end of the visible spectrum (between approximately 380 and 435 nanometers), [16] [17] whereas purple is the color of various combinations of red, blue and violet light, [5] [6] some of which some humans perceive as ...
green 23841f: Altrincham–Piccadilly purple 711279: Eccles–Ashton (peak only) light blue 5fc9f3: Piccadilly–Bury yellow edb600: East Didsbury–Rochdale pink ef80b1: East Didsbury–Shaw (peak only) brown 867864: The Trafford Centre–Deansgate red e20006: Manchester Airport–Victoria dark blue 1769b4
blue, purple or red; blue and purple if the molecule regains an electron after it has been ionized, red if returning to ground state from an excited state. Oxygen is unusual in terms of its return to ground state: it can take 0.7 seconds to emit the 557.7 nm green light and up to two minutes for the red 630.0 nm emission.
Fluorescence involves the elevation of electron energy levels by quanta of ultraviolet light, followed by the progressive falling back of the electrons into their previous energy state, releasing quanta of visible light in the process. In fluorite, the visible light emitted is most commonly blue, but red, purple, yellow, green, and white also ...
Figs 2 larva after 1st moult 2a, 2b, 2c larva after 4th moult 2d, 2e, 2f, 2g, 2h, 2i after 5th moult in different positions 2j pupa front view and side view Caterpillar of purple emperor Purple emperors (Apatura iris) and lesser purple emperors (Apatura ilia) sucking moisture from the body of a dead European brown frog (Rana temporaria) in Ukraine.
This model designates red, yellow and blue as primary colors with the primary–secondary complementary pairs of red–green, blue-orange, and yellow–purple. [2] In this traditional scheme, a complementary color pair contains one primary color (yellow, blue or red) and a secondary color (green, purple or orange).
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.
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.