Mathematically defined units - benefits

[FrankM]

My email experience with BIPM, at Sèvres, has been negative, never a reply. One must get beyond the varnish BIPM has applied to an old product in order to make it look like it is new. We need to go back to when the BIPM (Metre Convention) was established, 1875, and to the definition of the metre. The BIPM adopted the existing duration for the second.

 

In 1799, the length of the metre was decreed to be one ten-millionth of a quadrant of the Earth, actually measured as the distance on the meridian between the Dunkirk and Barcelona. The size of the metre has not changed, it's definition has been re-varnished with a new definition. The Brits could have done just as well with the yard, or the fathom, defining their sizes in how far, in those units, for light to travel in one second. Simply defining a unit's value in relationship to a measured physical law value does not make the unit a fundamental physical constant, it is a relative constant, which can be any size. Please examine what the CCU, a committee of the BIPM, stated concerning the SI base units.

 

 

Flash forward to Jan 24-25, 2011 (350th anniversary of the founding of the Royal Society) where there is going to be a Discussion meeting at the Royal Society with the title New SI. The first sentence is quoted below:

 

There is a difference between defining all of the base units of the SI in terms of fundamental physical constants and a system of measurement based on invariant quantities of nature. Invariant quantities of nature can be extracted from many processes, at least as invariant as we can measure them on the earth's surface.

 

The Methodology defines a unit of length and a unit of time without needing to measure anything.

 

Length and the time duration can now be defined in terms of fundamental physical constants. A energy unit can be created based upon the same concept, as it will be absolutely related to the energy conditional that is associated with the propagation of electromagnetic waves.

 

The web site cited in the previous post, Methodology, now provides a link to the IEEE publication that contains the article titled, "A Methodology to Define Physical Concepts Using Mathematical Concepts"