الألوان .. كتاب في سبيل موسوعة علمية .. الدكتور أحمد ذكي

Colors

You see wheat flour, or corn flour, or rice, or perhaps you see cheese and yogurt, and you want to describe its color, so you say it is white. And you see the depth of coal, or the tar of oil, or the hair of some human beings filling his head, and you say: This
Black Color .

You mix white wheat flour with black charcoal flour, and you get a color that is between white and black. It is gray, and it is shades of white or black. These are the colors that make up the white of the day and the black of the night, and everything in between.

You roam the surface of the Earth searching for its rocks, and its rocks reveal to you various colors. These colors flourish until the rock becomes a precious stone, including rubies, emeralds, aquamarines, and so on. You roam the land and often find the green color. The fruits come out, and the flowers come out, in various colors. Cucumbers are green, bananas are yellow, and roses are red and yellow. As in crops, in every other living creature... in insects, and in other animals.
In fish, and especially in birds.

Nature, in its various activities on the surface of this earth, and its various creatures, produced colors that no other celestial body, such as the moon, was unable to produce, since the moon has no life in it, so colors that only plants can produce, or the living things that live on plants, are impossible to produce.

There is blueness in the Earth's sky, but it is not blue in the moon's sky
Man was not satisfied with the color that produced the dead earth, nor with the one with which it clothed and beautified all living things, so he began with science, and chemistry in particular, to create color, and he made thousands of it. He decorated the houses, decorated their furniture, and decorated the clothes of their residents. With the science of flowers, he created new colors for gardens that plants alone had not known, until man began to live a living. Color is some of its origins.

Man created art, and color was the brightest thing in it, and man inherited art with wonderful images, depicting the lives of people on this earth. Quills carried yellow, red, and green dye from the patch of colors, and spread them on canvases of burlap, creating from all of that what made me cry at times, what made me laugh at times, and what the viewer in front of him remained silent about laughing or crying, dreaming, contributing, trying to contain the psychological movements buried in these images. The wonderful one.

⏺The desert was filled with color. They were precious stones.
⏺The flowers and fruits were colored with colour, and that was the beauty of nature.
⏺And man created art, and color was the clearest thing in it.

The color was vague and then revealed:

The ancients knew color, there is no doubt about this. but how
Did they understand it? How did they explain it?

History says that they understood color as a characteristic of the body. A red body is red because it contains redness, and a yellow body is yellow because it contains yellowness. It is as if redness and yellowness are two things that come out of bodies.

This statement includes something that is not entirely true, nor is it
Half the truth, but it resembles some truth. This is evident from what we mentioned about how more recent people understood color.

Understanding color is closely related to understanding light,
Especially sunlight.

There is no doubt that it was possible for ancient man to understand that white light is a composite thing. He knew glass, and he had no doubt seen light emerging from its beveled edges sometimes, and it was a colored thing. It comes out not white, but colours.

Likewise, soap bubbles appeared to him in the light, as if they were a source of many colors.
And the rainbow, which appears in the sky after rain, appeared to people long ago, and colors appeared in it that are like the colors known to modern people, and they knew that the white color dissolves into it.

The French philosopher and scientist Descartes was alerted to the rainbow and was the first to give the idea to Europe that the white color of the sun ran out of the rainbow, which is droplets of water, dissolving into the colors people saw of it.

(The glass prism, and the white rays of the sun fell on it, and it was composed of many colors that were refracted inside the glass to different degrees.
It came out like this at different angles and dispersed, and when it fell on a curtain of paper, its color appeared. She can only be seen by falling on such a curtain, either
The colors you see in the picture indicate, not what the rays show, but what they will appear if they fall on the white paper.)