<Tr> <Td> Retina </Td> <Td> The mixed light activates the M and L cones on a spot on the retina about equally . </Td> </Tr> <Tr> <Td> Brain </Td> <Td> The brain interprets the equal amounts of M and L signal as yellow . </Td> </Tr> <P> To fully understand the process, it should be demonstrated how dull colors are obtained using cyan, magenta, and yellow instead of red, green, and blue . </P> <Table> <Tr> <Td> Light source </Td> <Td> Cyan (short to medium wavelengths) and yellow (medium to long wavelengths) light radiate from two different projectors . </Td> </Tr> <Tr> <Td> Projection screen </Td> <Td> Both the cyan and yellow reflect off of a spot on the screen . </Td> </Tr> <Tr> <Td> Retina </Td> <Td> M cones on a spot on the retina are strongly activated by both the cyan and yellow light, while S cones are activated by cyan and L cones by yellow . </Td> </Tr> <Tr> <Td> Brain </Td> <Td> The brain receives signals from the cones about some short, lots of medium, and some long wavelengths . It interprets the signal as pale (unsaturated) green . </Td> </Tr> </Table>

What are the secondary hues of the scientifically correct additive colors