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Wikilla
Guest
What exactly makes the sky blue, or grass green, etc.?
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Patrick C
Guest
The perception of reality. Before you can join the game, you must first see through the illusion that is around you.
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andygroch
Guest
Light. With out it everything would be black and white.
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Cha cha
Guest
The sky is blue from reflection and the grass is green from chlorophyll. Pigment is what makes the difference. Colors really stand out when they are in contrast.
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Ava
Guest
The way humans perceive color is simply the way our brains interpret light waves.
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Sam B
Guest
There all just a matter of light and water. The sky is blue because water reflects the sun on to the sky. Chlorophil (however you spell it lol) Makes plants green within the cells.
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MISAN THROPE
Guest
Light is electromagnetic radiation of particular wavelengths. Humans are only capable of responding to a small part of the electromagnetic spectrum, which we call the "visible spectrum", due to the nature of the chemical pigments and response capabilities of photoreceptors of the retina. The visual spectrum is between wavelengths of 400 and 700 nanometers (nm). Isaac Newton first showed the white light was made up of a mixture of many different colours, or different wavelengths, and these could be separated using a prism.
Most of the light reaching the eyes is reflected off of surfaces. So what is it about a green surface that makes it green? The answer is that some wavelengths are reflected and some are absorbed. A green surface is one which reflects medium wavelengths and absorbs longer and shorter wavelengths. So, surfaces are not "coloured" - they just have different reflective characteristics. This process is known a "subtractive colour mixing" where the "colour" is what remains after different parts of the illuminant light have been subtracted out. This can also be done using coloured filters (like in stage lights). In contrast to this, superimposing different wavelengths of light is "additive colour mixing", where what is reflected is the sum of the different lights. Additive colour mixing is the process that occurs in a colour television. This colour mixing can be done by taking advantage of the limited spatial resolution of the retina (spatial summation), or alternatively, it can be done by taking advantage of limited temporal summation by using rapidly flickering pictures.
So far, all that has been said is about the physics of coloured light, like how wavelengths are absorbed and reflected off surfaces, and subtractive and additive colour mixing. But, what about the actual perception of different wavelength?
Newton said that "The rays are not coloured",they are only coded in the visual system.
Therefore we see colour vision as a process of detecting the wavelengths reflected from local areas and then "correcting" those signals to give us colour constancy..The thing is,in the absolute reality,colours most likely do not exist,the same thing applies to the sounds.Everything is just about wavelengths and frequencies,ultimately,all what we interpret as reality is merely subjective perception and therefore illusion.
Most of the light reaching the eyes is reflected off of surfaces. So what is it about a green surface that makes it green? The answer is that some wavelengths are reflected and some are absorbed. A green surface is one which reflects medium wavelengths and absorbs longer and shorter wavelengths. So, surfaces are not "coloured" - they just have different reflective characteristics. This process is known a "subtractive colour mixing" where the "colour" is what remains after different parts of the illuminant light have been subtracted out. This can also be done using coloured filters (like in stage lights). In contrast to this, superimposing different wavelengths of light is "additive colour mixing", where what is reflected is the sum of the different lights. Additive colour mixing is the process that occurs in a colour television. This colour mixing can be done by taking advantage of the limited spatial resolution of the retina (spatial summation), or alternatively, it can be done by taking advantage of limited temporal summation by using rapidly flickering pictures.
So far, all that has been said is about the physics of coloured light, like how wavelengths are absorbed and reflected off surfaces, and subtractive and additive colour mixing. But, what about the actual perception of different wavelength?
Newton said that "The rays are not coloured",they are only coded in the visual system.
Therefore we see colour vision as a process of detecting the wavelengths reflected from local areas and then "correcting" those signals to give us colour constancy..The thing is,in the absolute reality,colours most likely do not exist,the same thing applies to the sounds.Everything is just about wavelengths and frequencies,ultimately,all what we interpret as reality is merely subjective perception and therefore illusion.
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Paul G
Guest
sky blue = the ocean's reflection (or something like that)
Grass green= chlorophyll
colors has to do with different frequencies of light (i don't understand it)... but im sure you have seen a rainbow or looked through a prism..
color theory is really weird...
http://en.wikipedia.org/wiki/Color#Development_of_theories_of_color_vision
Grass green= chlorophyll
colors has to do with different frequencies of light (i don't understand it)... but im sure you have seen a rainbow or looked through a prism..
color theory is really weird...
http://en.wikipedia.org/wiki/Color#Development_of_theories_of_color_vision
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Mendo
Guest
the sky, I have no fucking clue.
but the grass's color is made up of pigments that are found in plant cells. There are red,yellow and green pigments. This is why durring the fall leaves turn read or yellow, beacuse there is less green pigments, and more of the red and yellow.
but the grass's color is made up of pigments that are found in plant cells. There are red,yellow and green pigments. This is why durring the fall leaves turn read or yellow, beacuse there is less green pigments, and more of the red and yellow.