What is color? Detailed answer

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What is color? Detailed answer

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What is color?

Passing a beam of light through a glass prism, Isaac Newton proved that sunlight is made up of different colors. Refracted in a prism, it forms a spectrum.

For most of us, the spectrum consists of 6 or 7 colors, but devices emit more than 100 shades. White is made up of three primary colors called "primary colors". These are orange-red, green and violet-blue.

The spectrum contains three more mixed colors that are visible to the naked eye. They are called "secondary colors". These are greenish blue, yellow and purplish red.

Secondary colors can be obtained by mixing other shades.

The colors correspond to the wavelengths that the human eye perceives. Insects and animals perceive other wavelengths and see other colors.

Light or color waves have a very short wavelength.

To give color to the paint, dyes are added that do not correspond to the colors of light. The secondary colors of the light correspond to the primary colors in the paint. That is, in the paint, the primary colors are yellow, greenish-blue, and red, and the secondary colors are orange-red, green, and violet-blue.

Hue is a color without the addition of black or white paint, such as yellow, red, blue, green. When combined with white and other shades, a halftone is obtained, such as pink and ivory. When you combine a pure hue, black and white, you get a tone. It is tan, beige, grey.

Red paint in a can looks black. Where there are no light rays, there is no color. In a dark room, we cannot see or distinguish colors because there are none. The color of an object depends on the material from which the object is made and its lighting. The orange-red sweater looks like this because the dye used to dye the wool reflects the orange-red part of the light rays and absorbs the violet-blue and green parts of the spectrum.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

When did regular rail service begin?

The first steam locomotive appeared in 1803, the first commercial railway in 1812, and the first permanent public railway in 1825. However, the first flights were not made regularly, but as needed, as people were afraid of the cast-iron puffing hulks. The first regular railway line, which used steam traction, appeared in 1830. All this took place in England.

In Russia, the first steam-powered locomotive (a locomotive is a self-propelled rail vehicle that can pull cars behind it), in other words, a steam locomotive, was designed by father and son Cherepanovs in 1834. It was a platform on four wheels with a boiler, two steam engine cylinders and a tender - a special water tank.

The first railway (from St. Petersburg to Tsarskoye Selo) was opened in 1837.

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Broccoli against blood clots 07.03.2024

The chemical sulforaphane found in broccoli has a beneficial effect on preventing blood clots. Unlike other blood clot medications, sulforaphane did not increase the risk of hemorrhage in mice. Scientists hope that this substance may be useful in the treatment and prevention of stroke.

The discovery of the beneficial effects of sulforaphane on the prevention of thrombosis opens up new prospects in the fight against fatal cardiovascular diseases. However, more research is required to understand the mechanism of action of the substance and its potential use in humans.

In the study, the researchers analyzed 23 chemical compounds commonly found in plant foods because many of them exhibit biological activity, including effects on blood clotting. In laboratory conditions similar to the environment found in arteries, sulforaphane was found to slow platelet aggregation, which may prevent the formation of blood clots that can cause a stroke or heart attack.

Scientists suggest that sulforaphane may be effective in both preventing stroke and reducing its consequences. Unlike the existing drug for treating the effects of stroke, which is effective in only a small proportion of patients, sulforaphane was effective in 60 percent of subjects in experiments on mice.

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