Stellar spectral classification utilizes seven main classes (O, B, A, F, G, K, M), ordered by decreasing surface temperature, with each class further subdivided into numerical subclasses (0-9) ...
ThreeNH (3nh), announced the launch of the KS-520 Nano Spectrocolorimeter, a portable device that meets the highest standards of precision and reliability SHENZHEN, GUANGDONG, CHINA, December 31, 2025 ...
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The Color Purple: A Brain-Made Illusion?
* Purple is a non-spectral color created by the brain from red and blue signals * Individual differences in eyes and brain make each person see colors uniquely * All colors we //perceive, including ...
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