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Originally, a metre was defined as 1/10,000,000th of the distance from the Earth's equator to the North pole. Since 1983 it has been defined as:
the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458th of a second.
Wiki User
∙ 7y ago
Wiki User
∙ 13y agoSince 1983 the meter has been defined as the distance light.
Wiki User
∙ 10y agoSince 1983, the meter has been defined as "the length of the path traveled by light in a vacuum during a time interval of 1/299,792,458 of a second."
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∙ 12y ago2 ballsacks
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What is the value of c in vacuum?
Velocity of light in a vacuum is exactly 299,792,458 meters per second. This in fact arises from the definition of the meter since 1983.
What problems are there in maintaining and using a metal bar as the primary length standard as was done before the meter was redefined in 1983?
Dimension change due to temperature fluctuation (expansion and contraction) would be one.
Who won The Nobel Prize in Physics in 1983?
Subramanyan Chandrasekhar won The Nobel Prize in Physics in 1983.
Why does the scale show 7g when you weigh a nickel?
My suggestion would be to calibrate your scale against known weights, including other US coins. Standard nickels weigh 5 gm, cents dated 1983 and later are 2.5, dimes are 2.27, quarters 5.67 and dollars 8.1 gm.
What is the weight in grams of a 1983 penny?
2.94 grams
How was meter defined in 1983?
From Wikipedia: "Since 1983, [the metre] is defined as the distance travelled by light in vacuum in 1⁄299,792,458 of a second." This is the currently used definition.
Who defined the 8 multiple intelligences?
Howard Gardner in 1983.
What are the release dates for Mama's Family - 1983 Double Standard 1-8?
Mama's Family - 1983 Double Standard 1-8 was released on: USA: 12 March 1983
When was Terms of Endearment created?
Terms of Endearment was created on 1983-11-23.
Who won the Oscar for Directing in 1983?
Terms of Endearment won the Oscar for Directing in 1983.
Standard length of a meter in 1983?
100cm
What is 1983 in roman numerals?
In today's terms it is: MCMLXXXIII
How was the length of a standard meter redifined in 1983?
it wasnt
What actors and actresses appeared in meters - 1983?
The cast of Metres - 1983 includes: Nevra Serezli Metin Serezli
How was the length of the standard meter redifined in 1983?
standard was changed to be associated with the constant speed of light
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.
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
