Home » The most accurate clock in human history-the “artifact” necessary for driving | Time | GPS

The most accurate clock in human history-the “artifact” necessary for driving | Time | GPS

by admin

Original title: The most accurate clock in human history is actually an “artifact” that you must drive

Beijing time:2021-06-07 03:17

[New Tang Dynasty Beijing time June 07, 2021]Whether we live a positive day or a day unconscious, time is the truest expression of life. For thousands of years, people have been chasing the sun, living a life of sunrise and sunset.

Looking back on this human civilization, the Egyptians used shadows to create the first clock in 5,000 years and divided the day into 12 periods. Since there is no sunlight at night, there is no segmentation. But the wise Egyptians did not stop there. They marked the time of night by observing the relative positions of the rise of 12 constellations in the sky. The two methods are added together to form the earliest clock.

Later, astronomers in ancient Greece used water droplets to fix the length of the hour. With the development of mathematics, the Greeks indirectly learned from the Sumerians to divide the circle into 360 degrees, dividing the hour into minutes, and then dividing the minutes into seconds.

The clocks we use today are derived from Galileo’s pendulum law. In addition, many Christians use springs and are the predecessors of modern clocks. With the popularity of computers, people’s lives are getting faster and faster. Everyone has stricter requirements for when to go to work, when to hold meetings, when to eat, etc. Therefore, people have more control over time and requirements on clocks. The stricter and stricter time has come, precision time has become a must in modern life.

See also  ENVA your English! - waz.de

In the 20th century, scientists began to use electronic technology to record time. After the quartz crystals are connected to the circuit, they vibrate 32768 times per second, which is smaller than the pendulum of a spring. Most of the gadgets we use to distinguish time today use these crystal pendulums. Nevertheless, quartz is not very accurate in measuring seconds.

Nowadays, the accuracy of global time measuring instruments can reach 2.6×10^-6 seconds, which comes from the global positioning system GPS. That’s right, it’s a must-have artifact every time you drive out! At present, the global positioning system uses the atomic time system, which is based on the internal characteristics of the cesium atom. In 1967, the 13th Congress of the International Committee for Weights and Measures decided: “The second is equivalent to the time elapsed by the electromagnetic oscillation 9192631770 of the level transition radiation of the hyperfine structure of the cesium atom 133 in the two ground states.

Unexpectedly, a navigation system is on the throne of the most accurate clock!

(Transfer from Voice of Hope International Radio/Editor: Ye Ping)

The URL of this article: https://www.ntdtv.com/gb/2021/06/05/a103135827.html

You may also like

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Privacy & Cookies Policy