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Concentration of light, especially sunlight, can burn. The word caustic, in fact, comes from the Greek καυστός, burnt, via the Latin causticus, burning. A common situation where caustics are visible is when light shines on a drinking glass. The glass casts a shadow, but also produces a curved region of bright light.
English: Refraction and reflection in a raindrop, producing a rainbow. White light separates into different colours (wavelengths) on entering the raindrop, as red light is refracted by a lesser angle than blue light. On leaving the raindrop, the red rays have turned through a smaller angle than the blue rays, producing a rainbow.
English: This is a diagram of a rainbow, based on File:Rainbow-diagram-ROYGBIV.svg, but with colors closer to the actual spectral colors. Date 6 July 2013, 20:32:16
ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. When making an artificial rainbow, glass prism is used, but the colors of "ROY-G-BIV" are inverted to VIB-G-YOR".
English: * A vectorized version of Rainbow-diagram-ROYGBIV.PNG. Rainbow diagram showing the conventional arrangement of colours: Red Orange Yellow Green Blue Indigo and Violet. The colours shown do not necessarily correspond to actual wavelengths.
Over most of the disc, scattered light at all wavelengths overlaps, resulting in white light which brightens the sky. At the edge, the wavelength dependence of the scattering gives rise to the rainbow. [5] The light of a primary rainbow arc is 96% polarised tangential to the arc. [6] The light of the second arc is 90% polarised.
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).
Photograph of a triangular prism, dispersing light Lamps as seen through a prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow). Different wavelengths (colors) of light will be deflected by the prism at different angles. [1]
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