Color Definition and 496 Threads

Hi guys, I am currently undergoing some measurement with TCS230 light to frequency converter, its actually a cmos color sensor, so the measurement result was made in period measurement. For white the output was not almost the same, but actually according to bitmap resolution, the R,G,B value...

Sad day for a Chelsea fan. Was really looking forward to a rematch in the Champions league final Chelsea V. Manchester United. I don't like either team that are through to the final. I guess I'd have to favor Barca now. If they play the same as they have against Chelsea in all fairness i...

In this project, by means of two mirrors (which can be tilted about two perpendicular axis) we deflect the laser beam so as to scan a rectangular screen and modulate the laser source to obtain a colored image on the screen. We don’t make use of sophisticated devices such as MEMS micromirror and...

I'm clueless.

How would you go about passing a color into a C# method and using that color inside the method to create a new pen? Assuming everything else is defined Is it MethodName(Color color) Graphics pen1 = new Pen(color.Color,1); or is it something completely different?

I'm trying to set the color using three integer values for R, G, and B stored in three int type variables (these values are randomly generated between 0 and 255). Previously we set the color (e.g. yellow) using g.setColor(Color.YELLOW). I'm unsure of how to do this. The course is online...

I feel silly asking this question because I thought I knew all about this. A friend of mine told me that water is actually blue. i.e. its blueness is not merely a matter of preferential scattering (the usual explanation), but that the chemical that is water is actually (very faintly) blue. He...

Homework Statement what color does a green cloth appear in yellow light Homework Equations The Attempt at a Solution i know its either green or black but i don't know which. Yellow light is either a wavelength of its own or a mixture of green and red, that's where my problem is...

Basically I wanted to teach myself about light and I have a question that i am not to sure about basically I know about the spectrum of light but I also know that two primary colours make a secondary color. yellow is either is own wavelength or its a mixture of green and red, so here's my...

Homework Statement By Wien's we can determine that the max wavelength radiated by the sun is around 500 nm. How does this compare to the apparent color of the sun? Attempt to explain this discrepancy. Homework Equations lambda_max*T=2.9x10^-3 The Attempt at a Solution I said...

My apologies if this has been posted before. n prisoners are wearing three different coloured hats. They are in a line so that they can see the people in front of them but not behind. They will each try to guess their own hat colour and if they get it wrong they will be shot, otherwise they...

If a person could orbit close to a neutron star what color would it appear to be? I have always imgained them to be blue, but this might be totally wrong. :rolleyes:

Hi, I've been a lurker here for a while but I finally have a question. I was wondering if there is a simple formula to calculate the Color Rendering Index(CRI) and Correlated Color Temperature(CCT) of a white light source.. To do this I would also need (I think) to make a some points on a...

For some people there seems to be something which is color that exists outside of electromagnetic radiation. As the typical question goes "Is your red my green?" I don't understand the argument though. If we look at what we mean by color the only thing we can possibly say is: "Well when my optic...

Color Force... gets stronger with distance?? Homework Statement It's not a real problem, more of a question... does the color force get stronger the farther apart the quarks are separated until it reachs about a 10^-15 m distance... adn why is this? Homework Equations The Attempt...

Hi, As part of my thesis research, I am trying to acetylate solid-supported secondary amines using acetic anhydride. I am doing this by a literature method, using 20% acetic anhydride in DMF with 1 mg/mL dimethylaminopyridine (DMAP) as a catalyst. The reaction takes place over a few hours at...

Hello all, I Found an old keepsake when I recently moved that I bought in Italy 15 years ago. It was a small statue of an owl that changed color when the weather was changing. It would be pink, blue most often or sometimes green. That statue itself didn't change, but rather it was the paint...

Is compton scattering the reason why different substance have different colors? I was thinking along the lines of substanes with higher energy electrons around the atom wouldn't cause too much of a change in the photons wavelength and atoms with lower energy electrons will absorb more energy...

Hi there! Everyone knows that the color of certain objects is due to their capability to absorb and to reflect light at certain wavelengths which has to do with the distance between the atomic or molecular energy levels. But I still have two stupid questions. 1. Consider ordinary objects like...

I just had a debate with my roommate who wouldn't agree that a color is an abstraction. I tried to explain to her that a property standing by itself is an abstraction, things that possesses this property can be concretions. She would say "color is a wavelength" to which I answered wavelengths...

I've been playing around with the QCD Lagrangian to get a better understanding of how it works. I can derive some classical, Maxwell-like equations; the inhomogenous ones are \nabla \cdot \vec E^a = -gf^{a}_{bc} \vec A^b \cdot \vec E^c + \rho^a \nabla \times \vec B^a -...

in identification of phenol with fecl3 if we add an acid (e.g:HCl) color of complex will disappear >why?

Is there any paper on the quantization of color? Maybe not since it’s obvious. I always thought that color was on a continuum. But now I realize that electrons jump between a limited set of orbits.

It's that time of year again. Or as Bob Dylan would say, "the leaves, they are a-changin'." I just found this cool website with maps of where the leaves are at peak color for parts of the USA. They update twice a week; go to these links and click on "Current _____ report" to get the latest...

I am looking for a detailed mathematical description of the color theory. In particular the tranformations from rgb to cmyk. Who knows where i can find some material? I googled a little bit but i found only superficial descriptions. thanks

in my chemistry lab we had a kind of color test. the thing was supposed to come as blue according to the lab manual. . It did not. to me there was no color.however my teachers forced me to believe what i was looking at was blue,supposedly "it is very faint". that was not mentioned in the...

So the doctor's told a woman who suffers osteoporosis not to wear black clothes! I guess he meant not to wear any dark color clothes since they absorb the most of sun light.Now I'm wondering if you know of any research on relation between health and the color of clothes.

in my chemistry lab we had a kind of color test. the thing was supposed to come as blue according to the lab manual. . It did not. to me there was no color.however my teachers forced me to believe what i was looking at was blue,supposedly "it is very faint". that was not mentioned in the...

When identifying resistors by colour codes there is gold (5%) and silver (10%) for tolerence. Is there any other colours for tolerence like these?

Hi everyone, In a light bulb, as we increase the temperature of the light bulb, the colour produced by the light bulb changes from red to blue ( intensity vs frequency curve shifts to the left). But if i want to have a red bulb with higher intensity ( i.e. brighter red) without...

Dear folks The case is this... to measure the color transmittance through a coating on a transparent sheet... and the values are in L, x, y [thought there should be a "y" but its not in the report]... Can anybody shed some light on how to interpret L, x, y in this report ? Thanks !

Visible light spectrum: http://upload.wikimedia.org/wikipedia/en/7/79/Spectrum4websiteEval.svg Wikipedia's article on color vision: http://en.wikipedia.org/wiki/Color_vision Response intensities for cone cells S,M,L: http://upload.wikimedia.org/wikipedia/en/1/1e/Cones_SMJ2_E.svg The way how...

I'm having trouble finding information on why when you get far away from a piece of paper covered in yellow and blue dots (evenly spaced) the sheet eventually appears green. I know this has to do with color resolution but not much beyond that.

Hi, I am struggling with a problem and do not know how I should approach it. I went to a baseball game with my son, where I bought him a packet of M&Ms. While eating the candy, my son asked me what color most of the M&Ms are. At first, I intended to tell him that there are equal numbers...

I finally managed to make my text invisible .. (I had to use it somewhere) :biggrin: Invisible text ... Select above COLOR="#E1E1E2"

Here's a pondering I have had for a while; suppose we created and alternating electric field of a certain frequency f, and then we created an alternating magnetic field to occur perpendicularly to the electric field, pi (or whatever) out of phase with electric field, also with a frequency f...

[SOLVED] Potential Energy Color Contour Question Homework Statement This graph is potential energy contour for deuterated water, HDO. The label on the horizontal axis is the O-H bond length. What I'm wondering is: How can you tell from this graph that the break of the O-H bond is favored of...

It is often claimed that in a hot climate, it is better to paint one's house white because it will reflect more radiation, while black paint will absorb more radiation. It seems clear that other things equal, this is correct. But I have two questions regarding this. 1) Which is more important...

It appears my desktop monitor is not displaying red. Incidentally I just purchased a laptop and was running it in front of the desktop monitor. I don't believe the problem is related to any manual change of setting, as I have not adjusted anything.

Dear PFers, could somebody provide an update on the searches for quark gluon plasma, the color glass condensate interpretation, and/or their conceptual basis ? I have found a few big documents, if somebody knows where to find the latest review it would be most welcome. I would like a preview...

[FONT="Georgia"][SIZE="3"]Homework Statement A beam of red light has twice the intensity as a second bean of the same color. Calculate the ratio of the amplitude of wave. Homework Equations intensity \propto (amplitude)^2 The Attempt at a Solution 1^{st} \mbox{ beam} = 2I 2^{nd}...

How do we determine color of solution? For example: Which compound forms a colorless solution when dissolved in H2O? a. Co(NO3)2 b. KMnO4 c. Na2Cr2O7 d. ZnCl2 Thanks.

Okay, so I was reading a forum on the color of a mirror. End result beign that it doesn't have one. But if color is only as we percieve it, then is color not really there, and 'light' is really the only factor? I'm just now picking up the whole physics things, so as much yet simple...

Hi all! I just joined the forums and hopefully my question is in the right place and isn't a lame one but I'm stuck so here goes: I want to know how to calculate wavelength from a known distance and color for Helium. I need exact wavelength. I already have the ranges obviously. Usually...

http://www.fireworkspop.com/colortest.htm have fun

[SOLVED] The four color map?? so i guess most of you know about the four color map theorm. i read about it in a book a couple of days ago and had some idle brain time today while driving a tractor. i scribbled out some maps on the dirt on the windows and always seems to enclose one region...

I would like to plot a curve with each point with different color. For example x0=2; for i=1:1:200 x1=x0*cos(x0)+exp(x0); plot(i,x1) (THIS IS THE PLACE WHERE I WANT TO PUT DIFFERENT COLOR) x0=x1; end

What color light is transmitted through a piece of red glass? I thought it would be red?

Ok, so have little philosophy background other than a few undergrad classes so I apologize if this is just plain ridiculous. This is a scenario I have pondered for awhile now and I wanted to see what everyone else thinks. [begin scenario] A simple scenario; two children in preschool (child A...

hi guys I am new here. for my final year physics assignment i am testing how colors are absorbed under water at different depths. i am planning to go scuba diving and take photos of a color spectrum at certain depths as was wondering if anyone here new much about this and would be able to...