Fayl Faylin tarixcesi Faylin istifadesi Faylin qlobal istifadesi MetamelumatlarSinaq gosterisi olcusu 800 526 piksel Diger olculer 320 210 piksel 640 421 piksel 1 024 673 piksel 1 280 841 piksel 2 560 1 682 piksel 4 232 2 781 piksel Faylin orijinali 4 232 2 781 piksel fayl hecmi 2 78 MB MIME novu image jpeg Bu fayl Vikianbarda yerlesir Aciqlama sehifesindeki melumatlar asagida gosterilib Vikianbar azad lisenziyali media anbaridir Siz de tohfe vere bilersiniz Xulase IzahPlatinum Iridium meter bar jpg English Computer generated image of International Prototype Metre bar made of 90 platinum 10 iridium alloy This was the standard of length for the SI Metric system from 1889 until 1960 when the SI system changed to a new definition of length based on the wavelength of light emitted by krypton 86 The length of the metre was defined by the distance between two fine lines ruled on the central rib of the bar near the ends at the temperature of freezing water The bar was given an X Tresca cross sectional shape to increase its stiffness to weight ratio improve its thermal accommodation time and so the graduation lines could be located on the neutral axis of the bar where the change in length with flexure is minimum The prototype was made in 1889 its length made equal to the previous French standard Metre of the Archives Twenty nine identical copies were made at the same time which were calibrated against the prototype and distributed to nations to serve as national standards The main problem with defining the unit of length by an artifact such as a bar is that there is no foolproof way of detecting a change in its length due to age or misuse It can be compared to other copies but these themselves may have changed in length This motivated the 1960 change to a definition based on light waves The bar is now kept in the collection of the BIPM museum Tarix Namelum tarix Menbe Originally downloaded from nbsp http www mel nist gov div821 webdocs 14 lsi 2 htm on NIST website Image currently at Length Evolution from Measurement Standard to a Fundamental Constant Physical Measurement Laboratory US National Institute of Standards and Technology NIST website No copyright attribution appeared with image Muellif NamelumUnknown author Icaze Faylin tekrar istifadesi Public Domain work by employee of US Federal Government Disclaimer on website With the exception of material marked as copyrighted information presented on these pages is considered public information and may be distributed or copied Lisenziya Public domain Public domain false false This image is in the public domain in the United States because it is a work of the United States Federal Government specifically an employee of the National Institute of Standards and Technology under the terms ofTitle 17 Chapter 1 Section 105 of the US Code العربية nbsp English nbsp 日本語 nbsp makedonski nbsp Nederlands nbsp BasliqlarazerbaycancaBu faylin neyi temsil etdiyine dair bir setirlik izahat elave etingilisInternational prototype metre barBu faylda tesvir olunan elementlertesvir edircopyright status nbsp ingilisictimai varidatyurisdiksiyasindadir Amerika Birlesmis Statlariteyinetme usulu work of the federal government of the United States nbsp ingilis Faylin tarixcesi Faylin evvelki versiyasini gormek ucun gun tarix bolmesindeki tarixlere klikleyin Tarix VaxtMiniaturOlculerIstifadeciSerh hal hazirki18 11 14 oktyabr 20134 232 2 781 2 78 MB XosemaHigher resolution 15 18 1 may 2005270 175 21 KB SvdmolenInternational Prototype Metre standard bar made of platinum irridium This was the standard until 1960 when the new SI system used a krypton spectrum measurement as the base In 1983 the current metre was defined by a relationship to the speed of light i Faylin istifadesi Asagidaki 2 sehife bu fayli istifade edir Etalon Metr Faylin qlobal istifadesi Bu fayl asagidaki vikilerde istifade olunur af wikipedia org layihesinde istifadesi Meter als wikipedia org layihesinde istifadesi Meter an wikipedia org layihesinde istifadesi Metro Longaria ar wikipedia org layihesinde istifadesi متر معيار تقني إريديوم نظام وحدات متر كيلوغرام ثانية arz wikipedia org layihesinde istifadesi متر ast wikipedia org layihesinde istifadesi Metru Iridiu azb wikipedia org layihesinde istifadesi متر ba wikipedia org layihesinde istifadesi Metr Halyҡ ara berәmektәr sistemaһy be tarask wikipedia org layihesinde istifadesi Metar Etalyon Mizhnarodnaya systema SI be wikipedia org layihesinde istifadesi Metr SI mizhnarodnaya sistema adzinak vymyarennya Etalon bg wikipedia org layihesinde istifadesi Metr br wikipedia org layihesinde istifadesi Metr bs wikipedia org layihesinde istifadesi Iridij ca wikipedia org layihesinde istifadesi Metre Metrologia Longitud Viquiprojecte Adaptacio de plantilles a Wikidata infotaules Mostres5 ce wikipedia org layihesinde istifadesi Metr cs wikipedia org layihesinde istifadesi Soustava SI Metr Etalon cu wikipedia org layihesinde istifadesi Myetro cv wikipedia org layihesinde istifadesi Metr cy wikipedia org layihesinde istifadesi Metr da wikipedia org layihesinde istifadesi Bruger Christian75 GS 77 Ir Meterkonventionen de wikipedia org layihesinde istifadesi Urmeter Entfernungsmessung Dimensionsanalyse Jean Antoine Chaptal Superdupont el wikipedia org layihesinde istifadesi Iridio Leykoxrysos Bikipaideia Lhmmata zwtikhs shmasias Wikidata en wikipedia org layihesinde istifadesi Iridium Metre Convention Platinum October 1960 Neutral plane eo wikipedia org layihesinde istifadesi Metro Bu faylin qlobal istifadesine baxin Metamelumatlar Bu faylda fotoaparat ve ya skanerle elave olunmus melumatlar var Eger fayl sonradan redakte olunubsa bezi parametrler bu sekilde gosterilenlerden ferqli ola biler Genislik4 232 pxHundurluk2 781 pxBits per component8 8 8SixilmamisSixilmisReng modeliRGBOrientasiyaNormalReng komponentlerinin sayi3Ufuqi xett600 dpiSaquli xett600 dpiData arrangementchunky formatProqram teminatiAdobe Photoshop CS2 WindowsFaylin deyismesi tarixi ve vaxti14 58 27 fevral 2008Reng sahesiFotosekilde reng secimi edilmemisdir Sekilin eni4 232 pxSekilin hundurluyu2 781 pxTarix ve vaxt reqemlesdirilir09 58 27 fevral 2008Date metadata was last modified09 58 27 fevral 2008IIM versiya2 Menbe https az wikipedia org wiki Fayl Platinum Iridium meter bar jpg