How does color blindness occur? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

How does color blindness occur? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

How does color blindness occur?

Light-sensitive cells - "rods", "responsible" for shades of gray, contain only one light-sensitive substance, visual purple (rhodopsin), which breaks up in the light and is restored in the dark. The sticks are the same. And cones, which are associated with daytime vision, contain iodopsin, which breaks down in the dark and is restored in the light.

There are three types of cones that perceive red, green and blue colors respectively. The lack of a light-sensitive substance in one of the types of cones leads to the fact that the eye does not perceive any color.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

What is the Rosetta Stone?

As you know, one of the greatest civilizations of all times and peoples was Ancient Egypt. For a long time, people began to dig up monuments, buildings, as well as all kinds of treasures of Ancient Egypt. Unknown writings were found on buildings and other objects, but no one could read them. And it seemed that there was no solution to these signs. The ancient Greeks believed that the priests of Egypt created these letters for religious purposes, so they called them hieroglyphs, which means "sacred incisions" in translation. This type of writing became known as hieroglyphs.

After the Greeks, no significant effort was made to decipher these inscriptions until the 1799th century, when many scholars took up the problem, but without success. Later, in XNUMX, an outstanding discovery was made. Near the mouth of the Nile River, a black basalt slab was found that had lain there for centuries. She was given the name Rosetta Stone, in honor of the city near which she was found. The Rosetta Stone makes the message carved in three different languages unique.

One of the languages is Greek, the second is hieroglyphs, and the third is a late form of Egyptian writing, the so-called folk cursive - one of the types of abbreviated hieroglyphs. Long years of study of these inscriptions began.

The Greek text could be read and understood, and finally, after comparing it with the rest, the centuries-old secret of hieroglyphic writing was discovered. This was done by a talented young Frenchman Jean-Francois Champollion. And as a result of this discovery, it became possible for historians to trace the life, customs and religious practices of the Egyptians up to 3500 BC. e. This is possible because hieroglyphs are the oldest form of Egyptian writing and one of the earliest known writing systems.

Essentially, these are inscriptions - drawings. Each picture represents an item. But as time passed, this writing developed, and subsequently the Egyptians began to record the concepts, sounds, and words.

Test your knowledge! Did you know...

▪ What is daltonism?

▪ How many moons does the Earth have?

▪ What diacritic began to be used as a decoration by rock bands?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

hot imprint 02.12.2006

A new method for detecting fingerprints, which allows finding these traces on metal heated to 600 degrees Celsius, was proposed by employees of the University of Wales in Swansea (UK).

The slightest amount of sweat contained on the fingers causes micro-corrosion of metal, such as grenades, cartridge or shell casings, or explosive device shells. An electrochemical reaction with sweat as an electrolyte causes persistent changes in the electric potential of metal atoms that last up to several years. The probe of a special scanning electron microscope, which measures the slightest changes in the electrical potential of the metal surface, builds a three-dimensional image of fingerprints.

A new method to identify those who loaded a weapon or prepared an explosive device "works" on surfaces made of steel, iron, zinc, brass and aluminum, including curved surfaces.

Other interesting news:

▪ Digital TV Tuner for Xbox One

▪ What does the neural network see?

▪ Octospot - action camera for diving enthusiasts

▪ Consciousness exists separately from the brain

▪ Folding electric car

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Riddles for adults and children. Article selection

▪ article An hour later, a teaspoonful. Popular expression

▪ article What is surrealism? Detailed answer

▪ article Elder herbaceous. Legends, cultivation, methods of application

▪ article Amplifier to Spectrum. Encyclopedia of radio electronics and electrical engineering

▪ article Refinement of the CD player. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews