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Qualia. The "redness" of red is a commonly used example of a quale. In philosophy of mind, qualia ( / ˈkwɑːliə, ˈkweɪ -/; sg.: quale /- li /) are defined as instances of subjective, conscious experience. The term qualia derives from the Latin neuter plural form ( qualia) of the Latin adjective quālis ( Latin pronunciation: [ˈkʷaːlɪs ...
Young–Helmholtz theory. Thomas Young and Hermann von Helmholtz assumed that the eye's retina consists of three different kinds of light receptors for red, green and blue. The Young–Helmholtz theory (based on the work of Thomas Young and Hermann von Helmholtz in the 19th century), also known as the trichromatic theory, is a theory of ...
The color of chemicals is a physical property of chemicals that in most cases comes from the excitation of electrons due to an absorption of energy performed by the chemical. What is seen by the eye is not the color absorbed, but the complementary color from the removal of the absorbed wavelengths. This spectral perspective was first noted in ...
Relativistic quantum chemistry. Relativistic quantum chemistry combines relativistic mechanics with quantum chemistry to calculate elemental properties and structure, especially for the heavier elements of the periodic table. A prominent example is an explanation for the color of gold: due to relativistic effects, it is not silvery like most ...
The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation ( light ). Electrons emitted in this manner are called photoelectrons. The phenomenon is studied in condensed matter physics, solid state, and quantum chemistry to draw inferences about the properties of atoms, molecules and solids.
The opponent process is a color theory that states that the human visual system interprets information about color by processing signals from photoreceptor cells in an antagonistic manner. The opponent-process theory suggests that there are three opponent channels, each comprising an opposing color pair: red versus green, blue versus yellow ...
On Colors (Greek Περὶ χρωμάτων; Latin De Coloribus) is a treatise attributed to Aristotle [1] but sometimes ascribed to Theophrastus or Strato. The work outlines the theory that all colors (yellow, red, purple, blue, and green) are derived from mixtures of black and white. On colors had a pronounced impact on subsequent color ...
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ...