(May 31, 2012 at 2:25 pm)downbeatplumb Wrote: Actually colour does not exist.
Quote:The first thing to remember is that colour does not actually exist… at least not in any literal sense. Apples and fire engines are not red, the sky and sea are not blue, and no person is objectively "black" or "white".
What exists is light. Light is real.
The grey tiles on the left look blue, and the grey tiles on the right look yellow You can measure it, hold it and count it (well … sort-of). But colour is not light. Colour is wholly manufactured by your brain.
How do we know this? Because one light can take on any colour… in our mind.
http://www.bbc.co.uk/news/science-environment-14421303
Interesting study, but I have to disagree. It seems to me the author is trying to force his conclusions at quite some points.
I think we can establish that every color is simply a combination of particular wavelengths of light. Basically, which color we perceive the object to be can be determined by which wavelengths it reflects. That is a pretty good argument for why colors do exist. Further, the fact that we can program computers to recognize colors further bolsters the argument.
Now, the examples the author gives here can be explained by filtration. As established, for us to recognize the color of the objects correctly, we'd have to perceive it correctly, i.e. without interference. So, putting a blue/yellow filter in one case or temporarily altering the color receptors in our eyes by focusing on different colors (thereby creating an internal filter), our perceptions are being tampered with. This would easily explain why we see different colors when the color of the original object is the same.