Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


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

Why was the kaleidoscope invented? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article Comments on the article

Did you know?

Why was the kaleidoscope invented?

The kaleidoscope was invented in 1817 by the Scottish physicist David Brewster (1781-1868).

This optical device was not originally considered a toy at all. He served as an assistant to artists in creating designs for fabrics, wallpapers, ceramics, in developing ornaments for shop windows, exhibitions.

The artist set a certain program for the kaleidoscope and received patterns either in cheerful, joyful colors, or, on the contrary, in strict, sad or even gloomy ones.

Author: Kondrashov A.P.

 Random interesting fact from the Great Encyclopedia:

What is GPS and GLONAS?

These are worldwide systems for determining the coordinates of objects that serve to navigate and search for ships in distress, all-terrain vehicles and even individuals GPS - American, GLONAS - Russian. 24 satellites of the GPS system, "hanging" above the Earth at an altitude of 20 km, can receive a signal from any point on the surface of our planet. At any time of the day, in any weather, three satellites, having received a signal, can determine the location of any sender of such a signal with an error of less than one meter.

The first three GLONAS satellites were launched in December 2006.

 Test your knowledge! Did you know...

▪ Why do we sweat?

▪ How many parts are soccer ball tires made from?

▪ Why did the Spartans use iron bars as money?

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:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Digital apocalypse 18.12.2021

Experts warn that in a few years we will face a digital apocalypse associated with an exponential increase in the amount of data that, until recently, no one could have imagined even in the wildest forecasts. In this regard, scientists call to recognize digital content as the fifth state of matter, along with gas, liquid, plasma and solid. They argue that at some point humanity will accumulate so much digital data that the number of bits that make up this data will approach the number of atoms that make up the entire Earth (10 to the 50th power).

To store and process this amount of information, humanity will require much more energy, in contrast to how much it currently produces. Hence the call of scientists to stop considering digital content solely as a virtual sequence of ones and zeros, and treat it as a specific physical quantity, that is, matter.

It is estimated that humanity generates data every day that requires 2,5 trillion bytes (eight times more than a bit) to store. To understand how much data will have to be stored on a certain area of ​​physical media, the size of a bit must be equivalent to the size of an atom. If we assume that the amount of data generated by mankind will increase by 50% every subsequent year, then the number of bits required to store this amount of information will be equal to the number of Earth's atoms in 150 years.

Following this logic of reasoning, half the mass of the Earth should be used to store this amount of information. It sounds incredible, but scientists have given calculations that confirm this. Of course, technological progress and new scientific discoveries may lead to the fact that the situation will not be so dramatic. However, we are rapidly approaching a point where such warnings should not be ignored.

Scientists also suggest that our lives in the future will be almost 100% virtualized. This means that it will be controlled by computer codes and bits. This may seem exciting to many, but in fact, such a prospect is frightening, and makes you think about the biblical question - Quo Vadis ...

Other interesting news:

▪ Dyson Solarcycle Morph Desk Light

▪ Flying Motorcycle Speeder

▪ It is useful for athletes to rinse their mouth with syrup

▪ Men should not drink after the gym

▪ Virgin Galactic supersonic aircraft

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site RF power amplifiers. Article selection

▪ article Let the loser cry. Popular expression

▪ article Why did they put covers on piano legs in 19th century England? Detailed answer

▪ article Fragrant annual savory. Legends, cultivation, methods of application

▪ article Electronic relay for turning on the cooling fan. Encyclopedia of radio electronics and electrical engineering

▪ article Heat up the bridge. physical experiment

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024