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How was the length of a meter redefined in the year 1993?
It was not. The current definition was established in 1983.
How was the length of a meter created?
The meter was defined by the French Academy of Sciences as the length between two marks on a platinum-iridium bar, which was designed to represent one ten-millionth of the distance from the Equator to the North Pole through Paris.In 1983, the meter was redefined as the distance traveled by light in free space in 1⁄299,792,458 of a second.
Where is the standard of measurement kept?
There are several standards of measurement: weight, length, time to name a few. The standard for weight is the kilogram. The standard was made in London and has been stored in Paris since 1889. See this NPR article for a recent update (8/20/2009): http://www.npr.org/templates/story/story.php?storyId=112003322 The standard for length is the meter, or metre. Until 1983, this standard was a platinum-iridium bar that rested next to the kilogram standard at the French Academy of Sciences. In 1983, the metre was redefined as the distance travelled by light in free space in 1⁄299,792,458 of a second. http://en.wikipedia.org/wiki/Meter The standard for time is the second. "Currently, the international unit of time, the second, is defined in terms of radiation emitted by caesium atoms." http://en.wikipedia.org/wiki/Time Most standards are abstracts, with qualities or characteristics not affixed to a particular object or instance, such as a number. These standards have no place to be kept, except in the imagination of those who conceive of them.
What are the basis why meter is the unit of length?
Historically, the metre was defined by the French Academy of Sciences as the length between two marks on a platinum-iridium bar, which was designed to represent 1⁄10,000,000 of the distance from the equator to the north pole through Paris. In 1983, it was redefined by the International Bureau of Weights and Measures (BIPM) as the distance travelled by light in free space in 1⁄299,792,458 of a second
Why is a meter the length it is?
The metre was originally defined as one ten-millionth of the distance from the North Pole to the equator, at sea level along the meridian that passed through Paris. Unfortunately, improvements in metrology meant that a measure that was meant to be a standard was not constant! So, in 1983 it was re-defined as the distance travelled by light in vacuum in 1/299,792,458 of a second
How was the length of a meter redefined in the year 1993?
It was not. The current definition was established in 1983.
Standard length of a meter in 1983?
100cm
How was the lenght of a standard meter redefined in the year 1983?
they put thangs tew gether nd they brainstormed alot.
What problems are there in maintaining and using a metal bar as the primary length standard as was done before the meter redefined in 1983?
Dimension change due to temperature fluctuation (expansion and contraction) would be one.
How was the length of a standard meter redifined in 1983?
it wasnt
How was the length of the standard meter redifined in 1983?
standard was changed to be associated with the constant speed of light
How was the length of standard meter redefined?
The standard meter was redefined in 1983 as the distance light travels in a vacuum in 1/299,792,458 of a second. This redefinition was based on the speed of light, providing a more precise and universal measurement standard for the meter.
How was the length of a meter redefined in the year 1983?
On October 20, 1983, the meter was officially redefined as the distance traveled by light in a vacuum during a time interval of 1/299,792,458 of a second.Light travels at 299792.458 km/sec, so the period was chosen as 0.00000000335641 second, or 3.35641 x 10-9 second.The original definitions (1799 and 1899) depended on a measured standard bar. In 1960, it was redefined as a relationship to the wavelength of light from ions of the element krypton. In 1980, the standard was based on the unusually cohesive wavelength of an iodine-stabilized helium-neon laser.
How was the length of a meter created?
The meter was defined by the French Academy of Sciences as the length between two marks on a platinum-iridium bar, which was designed to represent one ten-millionth of the distance from the Equator to the North Pole through Paris.In 1983, the meter was redefined as the distance traveled by light in free space in 1⁄299,792,458 of a second.
How was the length of a meter redined in 1983?
The metre was originally defined as one ten-millionth of the distance from the North Pole to the equator a;ong the meridian going through Paris. As the measurement of the earth improved, the metre had to be recalibrated. That is not much use for something that is meant to be a standard, So in 1983 it was redefined as the distance travelled by light, in vacuum, in 1/299792458 second.
What terms was standard meters defined in on 1983?
In 1983, the standard meter was defined in terms of the speed of light. Specifically, the meter was defined as the length of the path traveled by light in a vacuum during a specific fraction of a second.
What element was used to redefine a meter?
The element used to redefine a meter was the speed of light. Specifically, the meter was redefined in 1983 as the distance light travels in a vacuum in 1/299,792,458 of a second.
