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June 8, 2010

-er or -re?

srikanth @ 11:59 pm, GMT +0000 ( 1276041582 ) Play

4 things used in the definitions of what?

Cracked by varuns88 , dineshk , Rogi , Manish Achuth , Aparna , Ganesh Prasad , Dibyo , Ananth , krudebox , Thejas V R , Rahulk , Anubhav , Shwetha Maiya , udupendra , Logik , Xanda , Bharath , Qbrain , shrik and Higgers

Answer:

The metre, of course.

  1. The platinum-Iridium meter bar.
  2. Length of pendulum with half-period of 1s.
  3. 1650763.73 wavelengths of light emitted by “Krypton” 86
  4. Distance traversed in vacuum by light in 1/299792458 of a second, measured using a He-Ne laser.

Those of you who prefer the American spelling can skejjule some time to think about your lives.


23 Responses to “-er or -re?”

  1. Raghuvansh
    1
    9
    4

    SI Units


  2. varuns88
    4
    2
    2

    Metre


  3. dineshk
    4
    3
    2

    Definition of the metre. A bar made out of an alloy of Platinum and Iridium, a pendulumn with a half period of one second, the wavelength of a particular emission line of Krypton and finally the distance traveled by light in a certain time which is indirectly measured through the wavelength of the helium-neon laser.


  4. dineshk
    4
    3
    2

    Definition of the metre. A bar made out of an alloy of Platinum and Iridium, a pendulum with a half period of one second, the wavelength of a particular emission line of Krypton and finally the distance traveled by light in a certain time which is indirectly measured through the wavelength of the helium-neon laser.


  5. Rogi
    48
    10
    5

    Definition of a Meter/Metre listed with their dates:
    1=Sep 28, 1889
    2=May 8, 1790
    3=Oct 14, 1960
    4=Oct 21, 1983


  6. Manish Achuth
    16
    9
    8

    Metre


  7. Aparna
    1

    Meter (or is it Metre :P )


  8. Ganesh Prasad

    Definition of metre


  9. Dibyo
    11
    14
    10

    one metre, distance


  10. Ananth
    4
    5
    9

    ಮೀಟರ್ ಇದ್ದಾರೆ ಉತ್ತರ ಕೊಡಿ :) :D


  11. krudebox
    1

    Meter/Metre


  12. one metre


  13. Rahulk
    2
    5

    Metre!!!


  14. The Meter (or Metre)

    (
    prototype bar
    seconds pendulum
    kryptonite-86 (planet krypton)
    helium neon laser
    )

    Nice question guys :)


  15. Rahulk
    2
    5

    Plagiarising from Wikipedia :-

    Prototype metre bar — The first General Conference on Weights and Measures (CGPM) defines the metre 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 ice

    Meridional definition — 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.

    Standard wavelength of krypton-86 emission — The eleventh CGPM defines the metre 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.

    Standard wavelength of helium-neon laser light — The seventeenth CGPM defines the metre as equal to the distance travelled by light in vacuum during a time interval of 1⁄299,792,458 of a second


  16. Meter or Metre.


  17. udupendra
    4
    4
    7

    Meter or Metre?


  18. Logik
    1
    5
    3

    Definition of the Unit of Length in the SI units list – Metre


  19. Xanda

    The “meter” or “metre” of course.
    1. The platinum-Iridium meter bar.
    2. Length of pendulum with half-period of 1s.
    3. 1650763.73 wavelengths of light from a specfied transition in “Krypton” 86
    4. Distance traversed in vacuum by light in 1/299792458 of a second


  20. Bharath
    4
    2
    4

    Meter /Metre


  21. Qbrain
    1

    All these are used as standards to define the base unit of length in the International System of Units –> “Meter” (“Metre”).

    Pics are The platinum metre bar, constructed on 23 June 1799 and deposited in the National Archives.
    metre would be equal to the length of a pendulum with a half-period of one second.
    metre delineated now-a-days in labs as 1,579,800.298728(39) wavelengths of helium-neon laser light in a vacuum.


  22. shrik
    10
    7
    9

    # 1.2 Meridional definition
    # 1.3 Prototype metre bar
    # 1.4 Standard wavelength of krypton-86 emission
    # 1.5 Standard wavelength of helium-neon laser light

    (Ctrl+C, Ctrl+V from WP)

    The metre.


  23. Higgers

    Metre.


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