We cannot see a shade of bluish yellow because:
A) there is no set of cones responsive to combined shades
B) there is no set of cones responsive to wavelengths associated with yellow
C) ganglion cells that are excited by S cones are inhibited by M and L cones
D) ganglion cells that are excited by L cones are inhibited by M cones

Question

Quizplus · Accepted Answer

The opponent-process theory explains that certain color combinations are impossible to see because the same ganglion cells that are excited by short-wavelength (S) cones (which detect blue) are inhibited by medium (M) and long (L) wavelength cones (which detect yellow).

We Cannot See a Shade of Bluish Yellow Because