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COLOUR PERCEPTION
Noemí Lorenzo Pérez
Created on January 31, 2022
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Transcript
COlOUR PERCEPTION
Newton
Additive synthesis
Subtractive synthesis
Colour is a sensation our brain perceives.The surface of an object reflects some colours and absorbs all others. The colour we see is the one being reflected off by the object in form of electromagnetic waves.
Electro-magneticwaves
Noemí Lorenzo Pérez
3rd ESO EPVA
If we mix colour of light, the original colour gets lighter and lighter until we get white. This is what we know as additive synthesis.
The primary colours in the additive synthesis are: Red, Green, Blue violet (RGB). The secondary colours in the additive synthesis are: Yellow (R + G), Magenta (R + B) and Cyan (G + B).
If we mix pigments (which absorb light), we obtain darker colour until we get black. We call the mixture of pigments subtractive synthesis.
The primary colours in the subtractive synthesis are: Cyan, Magenta, Yellow (CMYK). K is for black colour, which is short for Key. The secondary colours in the subtractive synthesis are: Red (M + Y), Green (Y + C) and Blue Violet (M + C).
It is measured in nanometres (nm).
Each colour has a wavelength. The human eye is only able to see waves that oscillate between about 380 and 780 nanometres; is is called the visible spectrum.