# color

1. ### Color standards?

Hi everyone, I need an information about the following matter. Say, we are talking about kg and I have a scale to measure the weights. If I put a one kilogram on the scale I see 1 kg on the display of course. This is possible because there is a standard 1 kg in "International Bureau of...
2. ### Color fringes on heated plate

I've recently noticed that the ceramic plates I have home show an interesting light pattern whenever light is reflected on a slightly heated area of them. The setup is the following: a ceramic plate, a lightbulb a meter above it, and any means of heating such as blowing hot air or putting hot...
3. ### Question on the perception of color.

Below is a diagram as to how I understand light and its behavior in the physical world at a rudimentary level. My question is whether we interpret the absence of a wavelength as a certain color, the solitude of a wavelength as the color, or both. If you emit white light at a "green"...
4. ### Why does color conservation lead to anticommutation in three quark superfields?

I read in Weinberg's book(vol 3 page 237) that ''To conserve color, the coefficients of the operators (QQQL)_F(F means Fcomponent of (QQQL) operator of superfilds) and (UbarUbarUbarEbar)_F must be totally antisymmetric in the colors of the three quark or antiquark superfields,...''but I do not...
5. ### what is primary color and what is its significance??

Same as the title, thanks!
6. ### Reflected light and color

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 about...
7. ### what color does a green cloth appear in yellow light

basically yellow light is either its own wavelength or a mixture of green + red, so here is the question; what color does a green cloth appear in yellow light i know it could only be black or green but which one