what is the definition of a metre(distance)?

Answer 1

The meter is the length of the path traveled by light in vacuum during a time interval of 1/299 792 458 of a second.

Answer 2

The metre (in the U.S., chiefly meter) is a measure of length, approximately equal to 3.28 feet. As the basic unit of length in the metric system and in the International System of Units (SI: Système International d'Unités), the metre is defined as equal to the length of the path travelled by light in absolute vacuum during a time interval of 1/299,792,458 of a second. Historically, the metre was intended to be, and is very nearly, the ten-millionth part of the distance from the equator to the north pole.

Multiples and subdivisions of the metre, such as kilometre (1000 metres) and centimetre (1/100 metres), are indicated by adding SI prefixes to metre.

Answer 3

The meter is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.

Note that the effect of this definition is to fix the speed of light in vacuum at exactly 299 792 458 m·s-1. The original international prototype of the meter, which was sanctioned by the 1st CGPM in 1889, is still kept at the BIPM under the conditions specified in 1889.

Answer 4

The most perfect defination of a metre is "The distance which a light ray or a photon can travell in 1/(3*10^8) second in space".

Answer 5

The metre (in the U.S., chiefly meter) is a measure of length, approximately equal to 3.28 feet. As the basic unit of length in the metric system and in the International System of Units (SI: Système International d'Unités), the metre is defined as equal to the length of the path travelled by light in absolute vacuum during a time interval of 1/299,792,458 of a second. Historically, the metre was intended to be, and is very nearly, the ten-millionth part of the distance from the equator to the north pole.

Multiples and subdivisions of the metre, such as kilometre (1000 metres) and centimetre (1/100 metres), are indicated by adding SI prefixes to metre.

Timeline of definition
1790 May 8 — The French National Assembly decides that the length of the new metre would be equal to the length of a pendulum with a half-period of one second.
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, that is the distance from the equator to the north pole.
1795 — Provisional metre bar constructed of brass.
1799 December 10 — The French National Assembly specifies that the platinum metre bar, constructed on 23 June 1799 and deposited in the National Archives, as the final standard.
1889 September 28 — The first General Conference on Weights and Measures (CGPM) defines the length as the distance between two lines on a standard bar of an alloy of platinum with ten percent iridium, measured at the melting point of water.
1927 October 6 — The seventh CGPM adjusts the definition of the length to be the distance, at 0°C, between the axes of the two central lines marked on the prototype bar of platinum-iridium, this bar being subject to one standard atmosphere of pressure and supported on two cylinders of at least one centimetre diameter, symmetrically placed in the same horizontal plane at a distance of 571 millimetres from each other.
1960 October 20 — The eleventh CGPM defines the length to be equal to 1,650,763.73 wavelengths in vacuum of the radiation corresponding to the transition between the 2p10 and 5d5 quantum levels of the krypton-86 atom.
1983 October 21 — The seventeenth CGPM defines the length as equal to the distance travelled by light in vacuum during a time interval of 1/299 792 458 of a second.

Answer 6

Equal to 10 decimeters, 100 centimeters, approx the same as a yard. There is a standard for the exact length kept in some stupid science vault in some country that is also probably stupid.

Answer 7

metre means a line drawing 1000 millimetre of points or dots