We don't just want our food to taste good these days: It also has to look good. As a result, food producers use any of 14,000 laboratory-made additives to make our food appear fresher, more attractive or last longer on the ...
Jan 19, 2010
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Staring at a deep red light for three minutes a day can significantly improve declining eyesight, finds a new UCL-led study, the first of its kind in humans.
Jun 29, 2020
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The art of tattooing may have found a diagnostic twist. A team of scientists in Germany have developed permanent dermal sensors that can be applied as artistic tattoos. As detailed in the journal Angewandte Chemie, a colorimetric ...
Jul 18, 2019
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After years of research, the first bionic eye has seen the light of day in the United States, giving hope to the blind around the world.
Feb 5, 2013
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(Medical Xpress)—Italian psychologist Giovanni Caputo has conducted a study with human volunteers where it was revealed that when two people stare into one another's eyes for a long period of time, both can experience disassociation ...
After humans and Neandertals met many thousands of years ago, the two species began interbreeding. Although Neandertals aren't around anymore, about two percent of the DNA in non-African people living today comes from them. ...
Oct 5, 2017
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Learning your ABCs can alert you to changes in moles that could signal melanoma—the most serious type of skin cancer.
May 13, 2022
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Melanoma is a type of skin cancer that develops in cells that produce your skin's pigment. Regular skin checks can help you identify the warning signs and differentiate melanoma from noncancerous skin formations, according ...
Aug 5, 2022
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Legend has it that Marie Antoinette's hair turned gray overnight just before her beheading in 1791.
Jun 22, 2021
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Researchers at the Department of Psychiatry and Psychology, Center for Behavioral Health, Neurological Institute at the Cleveland Clinic in Ohio have authored a case report on the positive effects of psilocybin on color blindness.
Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, green, blue and others. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates.
Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).
This text uses material from Wikipedia, licensed under CC BY-SA
