YOUNG-HELMHOLTZ COLOR THEORY
\jˈʌŋhˈɛlmhə͡ʊltz kˈʌlə θˈi͡əɹi], \jˈʌŋhˈɛlmhəʊltz kˈʌlə θˈiəɹi], \j_ˈʌ_ŋ_h_ˈɛ_l_m_h_əʊ_l_t_z k_ˈʌ_l_ə θ_ˈiə_ɹ_i]\
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The theory of color vision, devised by Young and expanded by Helmholtz. It assumes that there are three fundamental color sensations: red, green, violet, and corresponding to these, three photochemical substances in the retina. Each of these, if acted upon alone, gives the corresponding fundamental color sensation. Other color sensations are due to a simultaneous action of two or three of these substances. White is produced by equal stimulation of all three substances; black by entire absence of all stimulation.
By Smith Ely Jelliffe
Word of the day
hydromorphic
- [Greek] Structurally adapted to an aquatic environment, as organs of water plants.
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