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CameraObscura
colour is the sensation caused by light as it interacts with the eye, brain, and our experience. The perception of colour is also greatly influenced by nearby colours in the visual scene. The term color is also used for the property of objects that gives rise to these sensations.
The Physics of Color
'Electromagnetic radiation is a mixture of radiation of different wavelengths and intensities. When this radiation has a wavelength inside the human visibility range (approximately from 380 nm to 740 nm), that radiation is called light. The light's spectrum records each wavelength's intensity. The full spectrum of the incoming radiation from an object determines the visual appearance of that object, including its perceived color. As we will see, there are many more spectra than color sensations; in fact one may formally define a color to be the class of all those spectra which give rise to the same color sensation.
A surface that diffusely reflects all wavelengths equally is perceived as white, while a dull black surface absorbs all wavelengths and does not reflect (for mirror reflection this is different: a proper mirror also reflects all wavelengths equally, but is not perceived as white, while shiny black objects do reflect).'
Production and Transmission of Light
ERWIN REDL
What sound does colour make?
For some people, a stimulus to one of the five senses evokes the sensation of another sense, as when hearing a sound produces the visualization of a color. For contemporary audiovisual artists, the possibilities inspired by this phenomenon, known as synesthesia, have expanded with the advent of recent digital technologies that translate all electronic media, whether sounds or moving images, into the zeros and ones of computer bits. The exhibition features several sensuous new media environments fascinating to technophiles and general audiences alike, heightening awareness of human perception and cognition. What Sound Does a Color Make? explores the fusion of vision and sound in electronic media, and connects the recent boom of digital audiovisual art to its pre-digital roots by presenting a selection of single-channel videos from the 1970s and ten contemporary works by an internationally diverse group of artists.
ILLUMINATED TILES Rogier Sterk
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RachelWingfield - 19 Dec 2003
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