9 years ago

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The color of laziness.

9 years ago
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sinokoperkowy róż (but some say it's real)

9 years ago
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серобуромалиновый [sʲˈerəbˈurəmɐlʲˈinəvᵻj]
The nearest translation is "gray-brownish-raspberry".

9 years ago
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hope

9 years ago
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Deleted

This comment was deleted 5 years ago.

9 years ago
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Dispersion :)

9 years ago
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Purple

View attached image.
9 years ago
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Hey. i'm offended!
jk

9 years ago
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View attached image.
9 years ago
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Transparent.
EDIT: Not a fake color, but my favorite color.

View attached image.
9 years ago*
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but it's a great color... think of the possibilities ;)

9 years ago
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Black because black is not a color

9 years ago
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actually, for paints, it's all the colors combined.
white is not a color, it reflects everything back, black absorbs everything ;)

9 years ago
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Well, it is the opposite from an optics perspective :P

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true. but white still reflects all ;)

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Light can't reflect light :P

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why not?

9 years ago
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Because a photon can't absorb or emit another photon :/

9 years ago
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whats the relevance? the color white is a reflective color. no photons pass through, all bounce back...
and if it's the white light, you can't see any light without a surface. even the small aerosols in the air are enough, otherwise, nothing

9 years ago
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You are mixing white - the light - with a white - the color - surface. You can't see white light , green light or any light, since you can only see the reflected light, and some matter is needed in order to exist a reflection. Matter absorbs photons and then emits photons. White light is just a collection of photons whose wavelength covers all the visible spectrum, having each wavelength the same intensity (number of photons). Color white is what we see when a surface emits the same quantity of photons that it absorbs photons in each wavelength of the visible spectrum.
Disclaimer: I'm not an physicist >_< Sorry if I said something absurd (surely I said something silly).

9 years ago*
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I'm not a physicist, but i understand light, some of it anyway.
and most of what you said is correct. except about emitting.
white is cold, black is warm. why? black doesn't emit back, white emits all. forget about the wavelength for a sec, does that make sense?

there are three parameters for light: absorbance, reflectiveness, and transmittance.
both are between zero and one. and their sum is always one. always...

most surface absorb than emit, but some mostly reflect, snow for example mostly reflects.
some allow light to go past them, think of a "white" glass, the ones that look like milk. some heat up, than emit a different wavelenght, some emit exactly what was absorbed.

i'm tired, if you want i can talk some more about light, but i need to catch up myself, this is from memory ;)

9 years ago
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9 years ago
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Ok. I had a very long explanation of what I was thinking of colour in general, but I accidentaly deleted it. I might recover some in further explanation.

Two things I'd like to add to this discussion are:

  • an eye can't actually see the difference between the light that has been reflected or comes directly from the source. It could have been possibly done by analyzing light polarization, but eyes are polarization-insensitive. So, we can see both reflected and non-reflected light and both can be perceived as coloured.

  • naturally, there is no such thing as colour. The only thing objectively present is the perceived light spectral intensity distribution function. What follows the light enetering the eye is its detection by an instrument with rather a poor spectral resolution and its processing by a fairly complex neural network, which reults in a notion of colour. I can't even grasp how ontologically different are "photon energy" and "phsycological concept", so I doubt I'd take up explaining the path from one to another. I might dig a bit deeper and tell about brain regions processing visual information, but that'd probably cause a lot more cmoplication and hardly explain anything.

Bonus link

9 years ago
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How can you see what color is a light with nothing around to reflect it? Can you perceive the colour of sunlight?

9 years ago
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The first question is a tricky one and I can't really provide an extensive answer. Remember my second note above: an eye can't distinguish between the light that has been reflected or that comes directly from the source, so there is actually no difference for an eye between the two types of light entering it. Thus a simple answer would be: in exactly the same manner we perceive reflected light colour. It's hard to give an extensive answer because the perception of colour has more to it than just the spectral distribution of light entering the eye, look, say, at the first example under "Color" here. Shows that two objects with the same spectrum can be perceived as different colours, so I can't really tell "how", because it's quite a pathway involving the light, the retina, retinal ganglion and then a number of nodes and areas in the brain responsible for vision. The thing is those are just the same areas that you use for processing the reflected light. Actually, you are doing it right now looking at your screen: light comes directly from it, but you perceive it as coloured (I assume you do, it might be that the alien physiology is totally different to what I'm used to). More examples would be: looking at a heated metal rod (usually red or yellow), shining a laser beam into your eye (not that I would recommend doing it), looking at an LED: the light is not reflected, but it still has colour.

The short answer for the second question is: yes you can. Fun fact: the sun is pretty much the best black body found in the solar system because of the notion of the black body, but it's white because the part of its spectrum that falls onto the human sensitivity range (see picture attached) is pretty uniform therefore it excites all the sensors rather equally and that's what we perceive as white. It might be slightly yellowish because it has a small peak at around 550 nm wavelength, but it's hardly noticeable, I guess.

View attached image.
View attached image.
9 years ago
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Just pointing out that spectral sensitivity to blue is a lot lower than in that graphic (that is, compared to green and red).
Also, I can see diode light because it is reflected in the wall, or in the smoke, or in any surface, but even if I see the wall of red colour, I don't see the hue between the diode and the wall of red colour...

9 years ago
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Yep, but I was just looking at the frequencies.
With the second one: you see the diode is blue if you look directly on it - that's the emitted light, but you don't see anything, say, between the LED and the wall because, I assume, the photons travel from the source to the wall and to see something inbetween you need some photons from there to be deflected into the eye.

9 years ago
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That was the thing I was not thinking, photons need to be deflected into the eye :P

9 years ago
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@TinyPurple

9 years ago
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this discussion got very long. and m139 is a physicist. so he probably knows what he is talking about.

9 years ago
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I'm actually quite unsure as it's totally not my field of expertise %)

9 years ago
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I am just trying to learn, and you are helping me a lot \o/ Thanks^^

9 years ago
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White and gold.

View attached image.
9 years ago
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BLUE I SAY! ;)

9 years ago
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oh not this again

9 years ago
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Deleted

This comment was deleted 4 years ago.

9 years ago
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Octarine :)

9 years ago
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I also prefer yellowish-greenish purple.

9 years ago
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THIS!
have you heard of this?

9 years ago
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Discworld? I have but not read yet :)

9 years ago
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I meant the GPU for Terry Pratchett.
you haven't read the Discworld? than how do you know of Octarine

9 years ago
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there's a dota item called that and I was curious and searched about its name

9 years ago
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ahhhhhhhhh
nice. well, read Discworld. great books ;)

9 years ago
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A mixture between green and black that i don't rember the name of.
Turkish Airlines Flight 278

9 years ago
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青?

9 years ago
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Maroon 5

9 years ago
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my favorite fake color is 3! It smells like thoughts!

(and that's,how you get into a madhouse :P)

9 years ago
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9 years ago
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View attached image.
9 years ago
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Colour of UV

9 years ago
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Hmm... rainbow

View attached image.
9 years ago
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