The meter is the most widely used unit of length in the world. In the international unit system, 1 meter is equal to 100 centimeters, equal to one thousandth of 1 km, equal to 3 meters or 6 feet 8 inches. However, you may not know that the emergence of the unit of length meter is closely related to the French Revolution, with the length of the earth, now let us learn about the interests hidden in it.

We start with the French bourgeois revolution, in 1791, the famous scientist with revolutionary ideas, Lagrange, was elected chairman of the French measurement committee. Under his full push, a unit of length that affected the whole world, the metre emerged from the surface. The relevant French authorities stipulated: the midline of the earth through Paris, that is, the definition of forty million parts of the length of the line is 1 meter. Generally speaking, the lm is one in ten million parts of the distance from the Earth's Arctic to the equator, and on March 25, 1791, the French National Assembly decided to adopt a system of measurement based on only one basic unit of length, the "mi".

The remaining question is how to measure the length of the Earth's midway. Though it is known to be a tough and long journey, and not half a mile, it is necessary to investigate carefully. The astronomers Joseph DeLambour and André Messier resolutely accepted this tough task. They agreed to depart from Paris, go backwards, and complete the measurement of the midway from Dunkerque to Paris, and then to Barcelona. But when they arrived at their respective destinations - Dunkerque and Barcelona, they began to measure the distance between each other. Based on the final measurement data, calculations were made to find out how long the midway was 1 meter. But, at the time, France was in a bourgeois revolutionary chaos, so confused. When the two heads of the family were banned from exploring Dunker

After a journey of seven years, Drumbull and Mechan finally met in the southern French Fort Carlson. When they returned to Paris with their research, Napoleon Bonaparte became the new ruler of France, and the political situation was restored. So the masses in Paris were able to welcome them like a hero. Napoleon, who admired science, also gave them a very high rating: ¡°Victory is like a cloud of smoke, but this achievement will live forever.¡±

The French Measurement Committee used the results of the measurements of two scientists to make a standard measure of the H-type with the use of the alloy of titanium as the archive of the raw material. The Committee also decided that France issued the Measurement Convention from 1812 and enforced it nationally in 1837 so that the Measurement Convention was first rooted in France. In 1875, the International Measurement Commission met in Paris in the 80th year after the birth of the Measurement Convention. Representatives of the 17 governments of France, Germany, the United States and Russia jointly signed the Measurement Convention and agreed to establish the International Measurement Convention. And recognized the Measurement Convention as one of the greatest scientific initiatives born in the French Revolution, determining the Measurement Convention as

Unfortunately, astronomers involved in the measurement work made a small mistake, resulting in the length of 1 meter shortened by 0.02 mm compared to the defined length. Later, the satellite accurate measurement found that the length of the line from the Earth's polar to the equator was 10,002,290 meters, not 10,000,000 meters of Messier's measurement, which means that the length of the standard unit was 0.02 mm shorter than the prescribed length. The famous cop writer Ken Old revealed in The Scale of Everything that Messier returned to Paris and found his measurement was wrong, because in the two summers he could not match the measurement results in the same place. This mistake has always caught Messier's sense of guilt, making Messier's night

Ken Alde argued that this error was caused by fine wear on the surface of the measuring instrument. And even without the measurement error, the goals set by Meshan and Drumball could not be achieved because they believed the assumption that the Earth was a rule sphere was wrong. The Earth was not a standard spherical pause, plus its surface had a high and low swing. However, Meshan was too harsh on himself, so a tragedy that could have been avoided occurred.

The progress of the era has made it more and more difficult to meet the need for precise measurement, so that a natural benchmark that will not be damaged has been created. At the 11th International Measurement Conference in 1960, the scientific community redefined rice. The new standard stipulates that in the vacuum, uranium 86 (a isotope of uranium) emits 1,650,763 times the same orange light wavelengths in each direction as 1 meter. Compared to the uranium alloy standard meter, it is more accurate. In 1983, the International Bureau of Measurements also defined meters as: in the vacuum light, the journey length of space in a second is 1 meter. The basic unit of wavelength defined by natural light wavelengths, not only makes "mi" more spiritual, more accurate, but also more su