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Does the response function is the similar concept with spectral sensitivity which as a function of frequency or wavelength of the signal.


Why is S so much lower than the other two? Is this somehow biologically advantageous?


@Jeyla probably because it is not necessary to detect these colors strongly. Also, lower wavelength colors carry more energy (they are higher frequency), so probably a "weaker" receptor is more optimal to prevent "saturation" of those cones (and allow higher dynamic range, essentially).


do rod cells also have LMS response functions?

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