## January 14, 2008

### Le Système international d’unités

Sidsen sent in this question. Thanks buddy!

Note to guest quiz masters: If the question you sent gets posted, pls post a comment under that post. (it can be the answer, extra fundae, rant for posting the question late and so on). In case we decide to give a free point for those who send guest questions(its being debated :) ), it will come in handy.

Now for the question:

While this stamp commemorates the introduction of the si system, the picture is a representation of what?

Cracked By: udupendra , madhur , nishas thambi , shenoyvarun86 , Dibyo , Poornima , jayanth , bs , duriel , shashank.

Answer:

Quoting udupendra:

The person is measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter.

Now, if you want a detailed version, look thru sidsen’s official answer :)

The person is measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter.

In 1954, France issued this stamp to commemorate its adoption of the metric system in the 1790s. French surveyors developed the system, and France was the first country in the world to adopt it. Translating from the French, the stamp reads, “For all people, for all time.”

The stamp, representing an angel Republican measuring an arc of meridian, was issued on the occasion of the 10 th International Conference on Weights and Measures.

In the picture the person is measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter. Hence, 10,000,000 m or 10,000 km, was reckoned as the distance from the equator to the North Pole. Through more accurate calculations, the distance has been determined to be a bit more — about 10,009 km.

“1791 March 30 — The French National Assembly accepts the proposal by the French Academy of Sciences that the new definition for the metre be equal to one ten-millionth of the length of the Earth’s meridian along a quadrant through Paris, that is the distance from the equator to the north pole.”

awesome question ra, sidsen! :-)

the person is measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter. Hence, 10 000 000 m, or 10 000 km, was reckoned as the distance from the equator to the North Pole…

http://www.metricphilatelist.n.....metric.htm

The dude is measuring a quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter. Hence 10,000 km, was reckoned as the distance from the equator to the North Pole. The distance has later been found to be 10,009 km!

France issued this stamp to commemorate its adoption of the metric system in the 1790s. It shows the person measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter. Hence, 10 000 000 m, or 10 000 km, was reckoned as the distance from the equator to the North Pole.

the Meridional definition of the length of a meter.

i.e one ten-millionth of the length of the Earth’s meridian along a quadrant, that is the distance from the equator to the north pole.

based on the expedition led by Delambre and Pierre Méchain, which measured the length of the meridian between Dunkerque and Barcelona. This portion of the meridian, which also passes through Paris, was to serve as the basis for the length of the half meridian, connecting the North Pole with the Equator.

Or something like that.

A person measuring 1/4 of the earth’s circumference since the meter was set to be 10^-6 of this distance

The story began on a cold rainy evening, in the later parts of the eighteenth century, when the stately silence which befitted the Count’s countenance was shattered by a single whisper, which seemed to resonate like a peal of thunder through the sparsely adorned room, which the Count these days called ‘home’. In those dark and troublesome times, there were two favoured approaches to the definition of the standard unit of length.

Revolution was waiting in the wings for its most magnificent stage debut, and it was this revolution that possibly spurred some to profess their keenness towards a standard set as the length of a pendulum with a half-period of one second. However the old guard had not yet called it a day, and with the nonchalant flourish, the marked reflection of years of hard wrought experience, they declared that a standard which didn’t make mention of the most glorious of, the romance of the romantics, the city of lights, could barely be a cogent definition. “Paris”. Ah! Paris, je t’ame.

Naturally, in face of such arguments, which had no counter, all other standards fell aside, and in 1793, in a singular defining moment, France adopted one ten-millionth of the distance of the Earth’s meridian, from the equator to the north pole, measured along the single quadrant passing through Paris as the length of a metre.

The days gave way under the passings of time, and many a kingdoms came, many a kingdoms went, many a war was won and many a war was lost, metre was one and many a metre lost. The worth of men and beasts were measured against this singular unit. The metre, just one ten-millionth of the meridian through Pari’, became the catalyst of ten million stories.

But the days thus, were soon to end…

…

Some guys in 1960 decided that the metre in the new SI system should be equal to an 1,650,763.73 wavelengths of the orange-red emission line in the electromagnetic spectrum of the krypton-86 atom in a vacuum. They even deemed it fit to teach that in schools these days. And length was never the same.

…

And still of a winter’s night, they say, when the wind is in the trees, When the moon is a ghostly galleon tossed upon cloudy seas, When the road is a ribbon of moonlight over the purple moor, the old definition of metre still comes measuring to the hearts of those who know, that a metre is more than just wavelength.

The person is measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter. Hence, 10 000 000 m, or 10 000 km, was the distance from the equator to the North Pole. (But we could just as easily say that a quarter of any great circle amounted to that distance.) Through more accurate calculations, the distance has been determined to be a bit more — about 10 009 km.

The person is measuring one-quarter of the earth’s circumference.

full story…

Notice that the person is measuring one-quarter of the earth’s circumference. Initially, one ten-millionth of this distance was set to be the length of a meter. Hence, 10 000 000 m, or 10 000 km, was reckoned as the distance from the equator to the North Pole. (But we could just as easily say that a quarter of any great circle amounted to that distance.) Through more accurate calculations, the distance has been determined to be a bit more — about 10 009 km.