Do natural tetrachromats have an expanded gamut? They are able to distinguish between colours which normal people see as identical, but are they capable of seeing colours which normals just cannot?
From the physics point of view colours are particular mixes of light with different wavelengths (or photons with different energy). “New” cones could perceive wavelengths that were not seen before—or they could, basically, turn out to be a different filter and so allow new combinations of perceptions, but no gamut extension.
Do natural tetrachromats have an expanded gamut? They are able to distinguish between colours which normal people see as identical, but are they capable of seeing colours which normals just cannot?
From the physics point of view colours are particular mixes of light with different wavelengths (or photons with different energy). “New” cones could perceive wavelengths that were not seen before—or they could, basically, turn out to be a different filter and so allow new combinations of perceptions, but no gamut extension.