The eyes have three different kinds of color receptors; One kind is most sensitive to short wavelengths, one to middle wavelengths, and one to long wavelengths
https://www.powershow.com/view4/641b2d-YmQ3M/The_eyes_have_three_different_kinds_of_color_receptors_One_kind_is_most_sensitive_to_short_wavelengths_one_to_middle_wavelengths_and_one_to_long_wavelengths_powerpoint_ppt_presentation
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