Color Definition and 496 Threads

Hello, My knowledge on particle physics is very limited (halfway through my physics bachelor) but if I have to write a popular-scientific article on quarkgluonplasma (QGP) for a certain course. And I have a fair general understanding, but I was wondering if there was still color confinement...

The liquid oxygen is blue in color because of unpaired electron in it. (According to molecular orbital theory) In gaseous state also it has unpaired electron but it is colorless gas. Why? Why color appear due to presence of unpaired electron?

Hello, I´m wondering if the new LED TV´s use the same energy everytime with independence of the colour. I´m explaining it better. With the "The Cathode Ray Tube" (CRT monitor) you use more energy if the image on the screen is white than it´s black ore dark. Around 15% more of energy. I...

Have you guys seen this: http://www.boston.com/bigpicture/2010/08/russia_in_color_a_century_ago.html Very cool. Also: http://blogs.denverpost.com/captured/2010/07/26/captured-america-in-color-from-1939-1943/2363/ If it hasn't been posted yet. Anyone else know of any really cool...

Homework Statement If a star emits the same intensity of radiation at all visible wavelengths, what will be its apparent color at the Earth’s surface? Homework Equations No equations... The Attempt at a Solution I realize that a horizontal line would occur through the visible...

Why do stars appear to be white in color when viewed from the naked eye?

Forgive me if this is the incorrect section of the forum for a question like this. If I already have used the CIE Chromaticity diagram to plot a color with dominant wavelength of 600 nm and maximal purity, how should I proceed to describe a color with half the intensity of said color -- i.e...

Hi All, I have this doubt from when I was a kid. Could never ask this question to anyone else except myself. Why does the wet part of a cloth looks bright (or say dark colored). I know its very silly question, but can't think of a reason. Kindly help. Thanks

Do people who are born blind, see in their dreams. if they do do they see in color ?

Hi! I am not quite sure if this is a valid question, but I'll give it a shot. What my education managed to teach me about how materials emit or reflect colors is, that it's (usually) related to electrons changing their energy levels. Though there are other causes like bremsstrahlung. Thus I...

I have been wondering how to realize the color of a mineral by having the absorption Spectra... The following case is an example; The image is the absorption spectra of a Bolivian Amethyst which looks like this; [PLAIN]http://www.tequilabay.com/amethyst300lbbolivian.jpg I have tried...

This looks like one silly question. Why does cloth or mud appear darker when wet?

Say you had a color picked out and a list of different colors that you wanted to find the closest matching color from. Is anyone aware of some formula to do this for computer RGB colors?

Hey folks, i recently stumbled across the notion "leading color" in some qcd paper. What puzzles me is, how can the color structure in qcd give rise to leading terms? Does any of you have an example for this? Or an explanation? Thanks! earth2

[FONT="Tahoma"]I've got some beads that will change color under sunlight. The stronger the intensity of sunlight, the darker (purple) the beads will turn. If the beads are put back indoor, they will resume their original color (white) after a while. The beads will also change color if they're...

Hi! For long time I have doubt about shipping.This is an option in most telivisons' MFG menus.. When I was repairing my hyundai TV remote.I just pressed down a key on board which was not given on case of remote.The whole colour was changed reddish.I then went deep in the options colour...

I was staring at the moon last night and noticed that as the clouds passed next to the moon a ring of color would surround the moon. The inner ring (closest to the moon) was blue. The middle ring looked yellow. And the outer ring looked red. It looked so cool! But i have no idea why this was...

Hello! I am trying to calculate the matrix element of the process where an incoming upp quark and gluon interact via an upquark and emit a photon and an upquark. ---u(p1)->--~~gamma(p3)~~ | | u(q) |...

I have been tasked with making a plot with a couple variables of available data. I'm to make a normal 2D scatter plot of the data with respect to 2 of the variables given, easy enough. But then I'm supposed to color (from red to blue) each point according to a 3rd variable, which is a derivative...

I'm not a physics whiz, so please be patient with me! I understand that when polarized light passes through an anisotropic sample, it bifurcates into the o-ray and the e-eay. The two rays emerge out of phase to each other and when they hit the polarizer, they recombine. Due to the fact that...

which colour is brightest (red monochromatic light, green monochromatic light and blue monochromatic light )? and which light will give highest radiant flux? why? Thank you

There's not a whole lot of info that I could find. Something about metallic particles and light wave shifting. I was hoping someone here knew more and could elaborate. Thank you in advance.

Hi this is a very elementary question. Is the strong force a color force? Or a favor force? Or a combination color and favor? Also with photons (massless) we have a r^-2 force but with massless gluons the force increase with r (do not know as what function) how can this be? Thanks.

What are really these electric sparks and why do they attain a characteristic color?

I'm considering changing my major to either electrical or mechanical engineering. However, I fail all color blindness tests. It always shows that I'm red-green color blind. But, I never have any issues deciphering different colors or hues. It seems as my brain has adapted to compensate for...

Is it be possible to produce from the Intensity return of reflective IR laser the true color of the object causing the reflection of the laser? My though is that surfaces of the same material, but of different colors would cause slight changes in wave length of the laser light. These changes...

What is your favorite color? Red it is for me.

Hello all, I am finding a distance to a cluster via Main Sequence fitting, and I don't know where to find an absolute color - magnitude diagram ( B-V, and V ). I can be from any star cluster, or sky region, as long as the magnitudes are absolute. I need the data tables, not just a pretty...

Hi all, I'm can't wrap my head around this. I get how the strong interaction bonds quarks into baryons and I get the pion exchange model for the attraction between nucleons (well sort of, I still don't understand how exchanging massive particles can result in an attractive force, but OK)...

Hi All, I know that the environment is responsible for people of African descent having black skin and people of Scandinavian descent have white skin but I cannot figure out the logic behind this. I thought it had to do with the absorption of Vitamin D from the sun and the Scandinavian...

I managed to pick up a few years old PSU from the computer science professor at college :D, If anyone remembers my post a few weeks ago I was very enthusiastic about this. However, I've identified all wires labeled and from the standard tutorials on the internet, the white wire typically listed...

I want to generate the following plot in Mathematica in red color: x[t_] := 31 Cos[t] - 7 Cos[31 t/7]; y[t_] := 31 Sin[t] - 7 Sin[31 t/7]; ParametricPlot[{x[t], y[t]}, {t, 0, 19 \[Pi]}] The above code creates the plot in default black color. So, I tried using this code to make it red...

isn't that different intensity of black and white in an old B&W photo correspond to a particular color range of the source. Which can then be converted into its original color?

isn't the frequency that is reflected back to a night vision device by a source at night correspond to a particular color? Which can then be converted back to its original color?

Where can i get the datasheet? thanks.

Does this make sense?This is the sensitivity of the 3 human cone cells. http://img192.imageshack.us/img192/4562/28030351.jpg This is the range of different colors that the human eye can see. http://img696.imageshack.us/img696/9397/31986914.jpg This color would appear white...

I'm trying to get a better understanding of color and visible light in general and see how every single visible color is formed. Does this sound right? The sun sends us white light which is a mixture of all the monochromatic colors that our eyes are sensitive to and when we mix both sides of...

Hi I'm writing a story and I need to figure out what color the sky is on a planet orbiting Zeta Tucanae that has close to the same atmosphere as earth. just so you know Zeta Tucanae's Spectrum is F9V and Color Index is 0.576 It would be great if you can tell me how to find the color...

What color is the sky on extra-solar planet? Hi I'm writing a story and I need to figure out what color the sky is on a planet orbiting Zeta Tucanae that has close to the same atmosphere as earth. just so you know Zeta Tucanae's Spectrum is F9V and Color Index is 0.576 It would be...

If there is a "red" color ball people told me that if i shine white light on it the "red" color ball absorbs all the light and reflects "red" photons hence we perceive it as "red" colored Is this true? if this is right i want to know more details... what does reflect mean here? what does...

I'm trying to understand quark color. Everyone seems to say that there are three quark colors, say Red, Blue, Green, that add up to uncolored. So why not just pick a basis, say Red and Blue, so that the color Green is equivalent to -1 Red plus -1 Blue?

A house with AC in a hot climate should be painted white (or covered with mirrors) to reduce absorption of light from the hotter sun and surrounding objects. That seems obvious. But what should cover a house in a cold climate? The house interacts with a system that is hotter than it (the sun)...

Hi,my question is the following: Supposing that we light up the same surface of an optical system (the eye) by two different monochromatic lights (each one characterized by a wavelength and intensity): Can we predict the color that will be perceived by the eye? Thanks for your help.

(Sorry if this message isn't in the right place, I couldn't find any other) Hi, I'm looking for a software that would give me the resulting color depending on the luminances of other colors (for instance 30% of red (680 nm) + 59% of green (545nm) + 11%of blue (440 nm) gives a white color)...

an emperor judged three prisoners to be executed, but he gave an exception to whomever gives the correct answer to his riddle will be set free. first, he asked them to line up, in a way where the first can’t see the two behind him, the second can see the one on front of him, and the third can...

Hello, can anyone give some advice about how to change the color of underbrace? The equation is in normal black color, but I would like to underbrace some of its part, but I want to have the underbrace in light gray. Is it possible to do it?(change the color of the brace only?) Thank you.

Since prime colors cannot be created by any combination of any other colors, and since composite colors are combinations of the prime colors by definition, does this mean that the prime colors could form a basis for a space of colors? If you split up a color into components, like real vectors...

Why is the color of the clouds dark pink in the night as compared to the black sky? Also..why is it white in the morning when the sky is blue..(is it because the cloud molecules scatter red wavelengths along with the blue ones? )

Hello, I'm not sure if this is the right place as it's not quite a technical question, but I hope you guys can help me. I have a question about a certain situation involving reflection of light and how it effects color, and it requires somewhat of an 'artistic' eye. I had a little debate...

Hi all. I have been searching over the web for some time, kind of frustrated... I would like to plot the contourplot of a function, and I would like the contourplot to be colored. The rule is that...the negative values should be blue in colors and the positive values should be red in colors...