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-the Nineteenth Amendment
Trichromatic Theory
A theory of color vision that proposes three types of color receptor cells in the eye, corresponding to three primary colors.
Color Vision
Color vision is the capability of an organism to distinguish objects based on the wavelengths (or frequencies) of the light they reflect, emit, or transmit.
Weber's Law
A principle in psychophysics stating that the smallest change in a stimulus that can be detected is a constant proportion of the baseline stimulus.
Noticeable Difference
The smallest change in a stimulus that can be detected by the senses.
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