CA POPPY
Santa Clarita, CA, USA
Senior Member
Joined: 07/07/2003
View Profile
|
I wonder how many Mantis Shrimp are home decorators? And who paid for that incredibly useful study? 
|
Orion
Pacific South West
Senior Member
Joined: 10/21/2002
View Profile
 Offline
|
Colour is perceived in the brain. Things are not really coloured, if you looked at the atoms that make up a banana skin, they would not be yellow, they would not have any colour. It's just when you put them all together in a banana skin, they all reflect white light at a certain frequency that our brain perceives as yellow.
And yes, Gasbag is correct, we may all see colours differently, there would be no way of knowing. What I see as red, you may see as blue, or some completely different colour that I cannot even imagine.
The electromagnetic spectrum is huge, we can only see a tiny slice of it. At each end, infra red & ultra violet, we lose our perception as we can only see a dark red or dark blue. Other creatures, that can see further into these ends of the spectrum, would see them as colours that are not dark red or blue, but something completely new.
Colour is a very strange phenomena, I still can't get my head around the fact that if you combine all the colours of a rainbow together you get WHITE ! and not the sludgey colour that you get when you put similar paints together.
Never miss an opportunity to walk on the grass.
|
Dandie Dinmont
Courtenay B.C.
Senior Member
Joined: 01/06/2008
View Profile
Offline
|
My DW can see more colors than I can see..
She can see tan and I see brown. I see "pink" - no, it's light salmon.
I could go on...
|
Crowe
Billerica, MA USA
Senior Member
Joined: 01/29/2002
View Profile
Good Sam RV Club
|
From Yahoo! answers:
Each of our eyes contain what is called rods and cones, these rods and cones enable us to see colours. Rods let us see brightness and Cones let us see colours. There are cone that let you see red, green and blue. When you have less numbers of a particular cone then you can become colour blind. In bright light you may see a green but in a different light it may appear brown.
i.e., green is green due to how our eyes are structured. However, I do agree that what one perceives as bright green may be a darker green to another.
Life is too short to spend it all in one place!
2004 Gulfstream Endura
2010 Subaru Outback soon-to-be toad
|
lesmore49
canada
Senior Member
Joined: 11/25/2004
View Profile
|
Orion wrote:Colour is perceived in the brain. Things are not really coloured, if you looked at the atoms that make up a banana skin, they would not be yellow, they would not have any colour. It's just when you put them all together in a banana skin, they all reflect white light at a certain frequency that our brain perceives as yellow.
And yes, Gasbag is correct, we may all see colours differently, there would be no way of knowing. What I see as red, you may see as blue, or some completely different colour that I cannot even imagine. I'm not sure about this. A friend and I are avid amateur photographers. We both have different makes (Canon, Pentax) of high end DSLRs. Recently we were both taking pictures of a '55 Cadillac which had a lovely tone of green paint. After we took our pix we as usual, we customarily check the LCD monitors on the backs of our cameras. I had been customizing my camera settings and exposures..he noted that in my pix the green Caddy had a bluish tinge...which wasn't present in the colour of the Caddy...according to both our eyes. We both agreed that the colour rendition from his camera (he kept the standard factory settings on his camera) was accurate with the colour that we both saw in the Caddy. Note I said 'accurate'...not more accurate...but exact... as judged by our two separate sets of eyes.
The electromagnetic spectrum is huge, we can only see a tiny slice of it. At each end, infra red & ultra violet, we lose our perception as we can only see a dark red or dark blue. Other creatures, that can see further into these ends of the spectrum, would see them as colours that are not dark red or blue, but something completely new.
Colour is a very strange phenomena, I still can't get my head around the fact that if you combine all the colours of a rainbow together you get WHITE ! and not the sludgey colour that you get when you put similar paints together.
Being a fan of vintage and modified cars and out there taking pix all the time, I have observed that there are so many variations in custom car colours that I believe that many of the apparently 10,000 colours that supposedly we humans see are just variations on the primary colours. I don't think that there are any unknown 'primary' colours out there that boldly show what no man has seen before.
I also question how scientists can assert that a Mantis Shrimp can detect 100,000 or even one colour...or assert that man can determine 10,000 colours.
lesmore49
|
|
|
PotKorn
St. Louis, MO
Senior Member
Joined: 02/01/2001
View Profile
Offline
|
lesmore49 wrote:I also question how scientists can assert that a Mantis Shrimp can detect 100,000 or even one colour...or assert that man can determine 10,000 colours.
I agree. That lying shrimp probably sat there saying, "Yeah, I can see the difference between those paint chips. What? You can't? Well, they're probably part of the 90,000 -- 90,000! -- colors that you poor human saps can't see."
My best scientific advice is that you should never take the word of some crustacean that's just stalling to avoid being placed on the grill with bacon wrapped around it.
And besides, how much do you trust these so-called "scientists" who refer to "the shrimp from Mars"? Everybody knows that Mars makes chocolate, not shrimp. Man, people are really gullible! I'm glad I could help clear it up. 
|
Orion
Pacific South West
Senior Member
Joined: 10/21/2002
View Profile
Offline
|
Quote:green is green
Well yes it is. It is true that the cones in the eyes are sensitive to certain frequencies (colours) and my 'green' cones pick up the same frequencies as yours do. This signal then gets sent to the brain where we actually do our 'seeing'. My brain colours the image a certain way which I call green. It's the colour of grass, trees and the bottom light of a traffic light. There is no way of knowing if we see it as the same colour.
With those two cameras Les, the same could apply. The fact that you both describe the tinge to the paint the same could still mean that you see it differently. There is no way of knowing.
|
8.1 Van
Millstone NJ
Senior Member
Joined: 03/20/2008
View Profile
Offline
|
The human eye and brain together translate light into color. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color.
Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.
Thus, red is not "in" an apple. The surface of the apple is reflecting the wavelengths we see as red and absorbing all the rest. An object appears white when it reflects all wavelengths and black when it absorbs them all.
Red, green and blue are the additive primary colors of the color spectrum. Combining balanced amounts of red, green and blue lights also produces pure white. By varying the amount of red, green and blue light, all of the colors in the visible spectrum can be produced.
Considered to be part of the brain itself, the retina is covered by millions of light-sensitive cells, some shaped like rods and some like cones. These receptors process the light into nerve impulses and pass them along to the cortex of the brain via the optic nerve.
Have you ever wondered why your peripheral vision is less sharp and colorful than your front-on vision? It's because of the rods and cones. Rods are most highly concentrated around the edge of the retina.There are over 120 million of them in each eye. Rods transmit mostly black and white information to the brain. As rods are more sensitive to dim light than cones, you lose most color vision in dusky light and your peripheral vision is less colorful. It is the rods that help your eyes adjust when you enter a darkened room.
Cones are concentrated in the middle of the retina, with fewer on the periphery. Six million cones in each eye transmit the higher levels of light intensity that create the sensation of color and visual sharpness. There are three types of cone-shaped cells, each sensitive to the long, medium or short wavelengths of light. These cells, working in combination with connecting nerve cells, give the brain enough information to interpret and name colors.
The human eye can perceive more variations in warmer colors than cooler ones. This is because almost 2/3 of the cones process the longer light wavelengths (reds, oranges and yellows).
About 8% of men and 1% of women have some form of color impairment. Most people with color deficiencies aren't aware that the colors they perceive as identical appear different to other people. Most still perceive color, but certain colors are transmitted to the brain differently.
The most common impairment is red and green dichromatism which causes red and green to appear indistinguishable. Other impairments affect other color pairs. People with total color blindness are very rare.
Birds, fish and many other mammals perceive the full spectrum. Some insects, especially bees, can see ultraviolet colors invisible to the human eye. In fact, color camouflage, one of nature's favorite survival mechanisms, depends on the ability of the predator to distinguish colors. The predator is expected to be fooled by the color matching of the prey. Until recently, it was thought that dogs didn't see any color at all. Recent studies now show, however, that dogs can differentiate between red and blue and can even pick out subtle differences in shades of blue and violet.
how do we see color?
2002 Chevy Express LS 3500 8.1 155" WB passenger van 3.73 posi (GT4/G80)
2003 Thor Citation 41-ZBSR 41ft TT
|
|
