4 ms·
Green is the feeling of EM radiation with wavelength between 520-570nm hitting your retina.
by extension 16y ago
Green is the feeling of EM radiation with wavelength between 520-570nm hitting your retina.
- a-priori 16y agoYes, and how do you know that we experience the same 'feeling'? That's what the philosophers are talking about.
- Jach 16y agoBecause to assume that each individual's brain is so different would go against all other evidence we have to the contrary.
- joeyo 16y agoI can also cause you to experience green by electrically stimulating your visual cortex, so ~500nm light need not be involved, nor your retina even. What is green now?
- jacobolus 16y agoThis is actually a dramatic oversimplification. Green is what you experience when (roughly) the difference between the amount of light w/ those wavelengths and the amount of light w/ wavelengths outside that range is greater than it was a (temporally) little while ago, or in comparison with the light coming in from areas nearby, and strongly affected by reasoning about what color the object "should" be, and what the quality of light is that is hitting the object. As you say, green is a "feeling", not embodied in the light itself, but only meaningful in the brain. So the "color" of a neutral gray card (or even something which emits no light at all) surrounded by a bright red object or looked at just after a bright red object is just as "legitimately" green as the light reflected from a "green" piece of paper or emitted by a "green" LED.