How does a rainbow appear? Detailed answer

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

How does a rainbow appear? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

How does a rainbow appear?

It appears when the sun shines in front of a rain cloud opposite it. At the same time, the sun's rays are refracted in water droplets, decomposing into spectral colors - red, orange, yellow, green, blue, indigo, violet - on the concave edge of the rainbow.

Seeing a rainbow is considered a very good sign.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

How did the Paricutin volcano in Mexico get its name?

On February 20, 1943, in the village of Paricutin, located three hundred kilometers west of the Mexican capital, a volcano appeared on the site of an ordinary corn field.

During the year, the volcano grew to a height of 450 meters and demolished the village from the face of the Earth, leaving its name to itself (the villagers managed to leave it).

Paricutin operated until 1952 and by that time had reached a height of 2807 meters.

Test your knowledge! Did you know...

▪ Do humans have teeth the same as animals?

▪ Where did the rings around some planets come from?

▪ Why did one Scotsman come to the funeral of his comrade-in-arms in a woman's dress?

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

Fast biofuel from algae 13.11.2012

Scientists at the University of Michigan may have made a breakthrough in algae-based biofuel technology. They have managed to create a process that turns an unprecedented 65% of algal mass into a so-called biocrude in one minute - a product similar to oil, usually obtained by rapid pyrolysis from wood. Biocrude can be used in modern refineries by first getting rid of the extra oxygen and nitrogen atoms that abound in living organisms.

The new process does not require waiting millions of years for natural raw materials to turn into oil. In a lab experiment, scientists filled a detachable steel tube with 1,5 ml of wet algae and placed the tube in sand heated to nearly 600 degrees Celsius. A small amount of algae turned into an oil-like product in just a minute.

Previously, scientists heated algae for a longer time: from 10 to 90 minutes. The best results with the conversion of half the volume of algae into biocrude were observed when heated for 10-40 minutes at a temperature of 300 degrees Celsius.

So far, scientists do not fully understand why short-term heating was more effective. Researchers believe that in fact the reactions that produce artificial oil are very fast and that when heated slowly, the process is simply slowed down by side reactions. Reducing the reaction time allows not only to increase the rate of production of artificial oil from algae, but also to reduce the size of the reactor, which will reduce the cost of the plant for the production of raw materials.

Modern commercial technologies for the production of fuel from dried algae are still very expensive, and as a result, the price of this fuel is more than $5,4 per 1 liter. The use of wet algae is cheaper because it does not require drying costs.

In addition, one of the advantages of the "wet" method is not only the extraction of oil from algae, but also the destruction of proteins and carbohydrates. That is, in just a minute, it is possible to achieve almost the highest possible efficiency and convert 90% of the chemical energy stored by algae into artificial oil.

Other interesting news:

▪ Smartphone Meitu Phone 2 with 13 MP cameras

▪ USB4 specification developed

▪ Copper for hospital

▪ US military looking for aliens

▪ Xiaomi Lady Bei Portable Face Skin Humidifier

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Computer devices. Article selection

▪ article Patron. Popular expression

▪ article Who Invented Stockings? Detailed answer

▪ article I pumped up the mattress, laced it up - a boat. Tourist tips

▪ article Mastic for the repair of rubber products. Simple recipes and tips

▪ article High quality IF audio amplifier. 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