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According to the Young-Helmholtz theory color vision depends on pairs of opposing retinal processes:________.1. The retina contains three kinds of color receptors. 2. Certain nerve cells in the brain respond to specific features of a stimulus. 3. The size of the difference threshold is proportional to the intensity of the stimulus. 4. The optic nerve processes top-down stimuli.

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ProfLincoln

Answer:

1. The retina contains three kinds of colour receptors

Explanation:

Young-Helmholtz theory color vision says human can perceive colour due to the presence of colour receptors in the retina that receives colour in various wavelengths

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