This video describes the idea and struggle behind the definition of meter. French academy of sciences tried many ideas but adopted the idea of measuring distance from north pole to equator and dividing that from 10 million.
In 1799 France produced official one meter platinum bar.
In 1960 Krypton-86 was used to redefine meter.
Finally in 1983 speed of light was used to define one meter.
This video describe all this with animation.
I hope you will learn something new after watching this video.
If you want to know about One Second then you can watch it here
[ Ссылка ]

свернуть