[DOC] [TLE] The Standard Meter [PAR] In 1960 the meter was redefined as 1,650,763.73 wavelengths of orange-red 
light, in a vacuum, produced by burning the element krypton (Kr-86). ... 
Conference on Weights and Measures has defined the meter as the distance 
light travels, ... metric system in 1866 on the basis that one meter is exactly equal 
to 39.37 inches. [DOC] [TLE] History of the metre - Wikipedia [PAR] In the aftermath of the French Revolution (1789), the traditional units of measure 
used in the ... 1,650,763.73 wavelengths of light from a specified transition in 
krypton-86 .... The international prototype would also be a "line standard"; that is, 
the metre ... A Krypton-86 lamp used to define the metre between 1960 and 1983. [DOC] [TLE] Meter | Define Meter at Dictionary.com [PAR] Meter definition, the fundamental unit of length in the metric system, ... the pole 
measured on a meridian: defined from 1889 to 1960 as the distance ... as 
1650763.73 wavelengths of the orange-red radiation of krypton 86 under 
specified conditions; and now defined as 1/299792458 of the distance light 
travels in a vacuum in... [DOC] [TLE] Metre | Define Metre at Dictionary.com [PAR] Metre definition, the fundamental unit of length in the metric system, ... the pole 
measured on a meridian: defined from 1889 to 1960 as the distance ... as 
1650763.73 wavelengths of the orange-red radiation of krypton 86 under 
specified conditions; and now defined as 1/299792458 of the distance light 
travels in a vacuum in... [DOC] [TLE] (Atomic number) 36 (Krypton and the history of the meter) [PAR] Sep 4, 2011 ... Center  A Tesla coil is used to excite the atoms in the gas, creating a plasma. ... 
inert gas is also important in the history of how the meter was/is defined. ... CGPM 
in 1960 using a definition based upon a wavelength of krypton-86 radiation. ... 
The meter is the length of the path travelled by light in vacuum... [DOC] [TLE] metre (m) | measurement | Britannica.com [PAR] It is equal to approximately 39.37 inches in the British Imperial... ... Metre (m), also 
spelled meter, in measurement, fundamental unit of length in the metric ... In 1960 
the metre was thus defined in the SI system as equal to 1,650,763.73 
wavelengths of the orange-red line in the spectrum of the krypton-86 atom in a 
vacuum. [DOC] [TLE] Standards of Length, Mass, and Time - Department of Physics ... [PAR] 1960th and 1970th  meter = 1 650 763.73 wavelengths of orange-red light 
emitted from krypton-86 lamp.  Since October ... Approximate Values of Some 
Measured Lengths ... kilogram (kg), is defined as the mass of ... of m, kg, s we can 
also use ... analysis is used to derive or check a specific equation ... 1 m = 39.37 
in. [DOC] [TLE] May 8, 1790: Libert! Egalit! Mtriqu! | WIRED [PAR] May 8, 2008 ... The gram unit of weight was defined by the weight of one cubic centimeter ... 
France also used a quasi-metric Revolutionary Calendar with each ... The meter 
was formally redefined in 1960 as 1,650,763.73 wavelengths in a vacuum of the 
orange-red light radiation of the krypton 86 atom (transition between... [DOC] [TLE] definition - WordReference.com [PAR] Weights and Measuresa unit of length, equivalent to 39.37 U.S. inches; ... of the 
distance light travels in a vacuum in one second. ... to the pole measured on a 
meridian: defined from 1889 to 1960 as the distance ... as 1,650,763.73 
wavelengths of the orange-red radiation of krypton 86 under ... Abbr.: m Also,[Brit.
,] metre. [DOC] [TLE] meter: meaning and definitions - Dictionary - Infoplease [PAR] meter: Definition and Pronunciation. ... to the pole measured on a meridian: 
defined from 1889 to 1960 as the distance ... 1983 defined as 1,650,763.73 
wavelengths of the orange-red radiation of krypton 86 under ... Abbr.: m Also, Brit.
,metre. ... of feet (usually used in combination): pentameter; dactylic meter; iambic

Question: In 1960 the wavelength of light from krypton-86 was used to define this measurement, also 39.37"
Answer: meter