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Chromostereopsis. Blue–red contrast demonstrating depth perception effects. 3 Layers of depths "Rivers, Valleys & Mountains". Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey ...
A person with synesthesia may associate certain letters and numbers with certain colors. Most synesthetes see characters just as others do (in whichever color actually displayed) but they may simultaneously perceive colors as associated with or evoked by each one. Synesthesia (American English) or synaesthesia (British English) is a perceptual ...
A phosphene is the phenomenon of seeing light without light entering the eye. The word phosphene comes from the Greek words phos (light) and phainein (to show). Phosphenes that are induced by movement or sound may be associated with optic neuritis. [1][2] Phosphenes can be induced by mechanical, electrical, or magnetic stimulation of the retina ...
Ebbinghaus illusion. The two orange circles are exactly the same size; however, the one on the right appears larger. The Ebbinghaus illusion or Titchener circles is an optical illusion of relative size perception. Named for its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909), the illusion was popularized in the English ...
Color symbolism. Color symbolism in art, literature, and anthropology refers to the use of color as a symbol in various cultures and in storytelling. There is great diversity in the use of colors and their associations between cultures [1] and even within the same culture in different time periods. [2] The same color may have very different ...
OCLC. 318274261. Light spectrum, from Theory of Colours – Goethe observed that colour arises at the edges, and the spectrum occurs where these coloured edges overlap. Theory of Colours (‹See Tfd› German: Zur Farbenlehre) is a book by Johann Wolfgang von Goethe about the poet's views on the nature of colours and how they are perceived by ...
Pillars of Creation is a photograph taken by the Hubble Space Telescope of elephant trunks of interstellar gas and dust in the Eagle Nebula, in the Serpens constellation, some 6,500–7,000 light-years (2,000–2,100 pc; 61–66 Em) from Earth. [ 1 ] These elephant trunks had been discovered by John Charles Duncan in 1920 on a plate made with ...
In Boulder, when you see a dot at the base of the tree, that signifies it needs treatment for emerald ash borer, elm scale, or drippy blight. Paint dots at head height mean the tree needs pruning ...