Why's a Meter a Meter?

The video explains the evolution of the meter as a unit of length. Initially, various units like the cubit and yard were used. The French Academy of Sciences aimed to standardize measurements, leading to the meter being defined as a fraction of Earth's circumference. A platinum bar was created as a standard, but it had limitations. In 1960, the meter was redefined using krypton-86 light wavelengths. Finally, in 1983, it was redefined as the distance light travels in a vacuum in 1/299,792,458 of a second, based on the constant speed of light.

What was the significance of the Treaty of the Meter signed in 1875?

How is the meter currently defined in relation to the speed of light?