Perception is individual and relative to previous experience.
(, Mon 30 Jul 2018, 15:18, Reply)
Colour is light of different wavelengths. Hubble can detect different wavelengths. It processes that information. It can see colours.
(, Mon 30 Jul 2018, 15:23, Reply)
The function of our cones varies.
I think we've been left arguing on the same side.
(, Mon 30 Jul 2018, 15:59, Reply)