Sí keldu fyri Millumtjóða eindarskipanin

Tú hevur ikki loyvi til at rætta hesa síðuna, orsakað av hesi orsøk:

Your IP address is in a range that has been blocked on all Wikimedia Foundation wikis.

The block was made by ‪Jon Kolbert‬. The reason given is Open proxy/Webhost: See the help page if you are affected .

Start of block: 13. nov 2023 kl. 21:21
Expiry of block: 13. nov 2026 kl. 21:21

Your current IP address is 2a01:7e00::f03c:95ff:feed:9834. The blocked range is ‪2A01:7E00:0:0:0:0:0:0/30‬.

Please include all above details in any queries you make.

If you believe you were blocked by mistake, you can find additional information and instructions in the Stewards Block Wizard.

Tú kanst síggja og avrita kelduna til hesa grein.

==== SI og náttúrukonstantar ====
[[Mynd:Relations_between_New_SI_units_definitions.svg|thumb|330px|Tær sjey grundeindirnar í SI-skipanini, [[Kelvin|K]], [[Sekund|s]], [[Metur|m]], [[Kilogram|kg]], [[Candela|cd]], [[Mol (eind)|mol]] og [[Ampere|A]], og teir sjey náttúrukonstantararnir, sum tær eru defineraðar útfrá.]]
Síðani 20. mai 2019 eru allar tær 7 grundeindirnar (og harvið allar SI-eindir) defineraðar út frá 7 náttúrukonstantum. Tað hevur millum annað við sær, at hesir 7 konstantarnir hava '''eksakt''' tey virðini, sum standa í talvuni niðanfyri.

{| class="wikitable" style="background:#FDFDFD"
|- 
! colspan=2| Konstantur !! Eksakt virði !! Síðani
|-
|style="text-align:center"|Δ''ν''<sub>Cs</sub>||Geislingarfrekvensur frá <sup>133</sup>[[sesium|Cs]]-atomi||style="text-align:center"| 9&#8239;192&#8239;631&#8239;770 Hz||style="text-align:center"| 1967
|-
|style="text-align:center"|''K''<sub>cd</sub>||Fotometriskur konstantur við 540&#8239;THz||style="text-align:center"|683 lm/W||style="text-align:center"| 1979
|-
|style="text-align:center"|''c''<sub>0</sub>||Ljósferðin í tóma rúminum||style="text-align:center"|299&#8239;792&#8239;458 m/s||style= "text-align:center"| 1983
|-
|style="text-align:center"|''h''||Plancks konstantur||style="text-align:center"|6,626&#8239;070&#8239;15&#8239;×&#8239;10<sup>−34</sup> J·s||style="text-align:center"|2019
|-
|style="text-align:center"|''e''||Elementarløðingin||style="text-align:center"|1,602&#8239;176&#8239;634&#8239;×&#8239;10<sup>−19</sup> C||style="text-align:center"|2019
|-
|style="text-align:center"|''k''<sub>B</sub>||Boltzmanns konstantur||style="text-align:center"|1,380&#8239;649&#8239;×&#8239;10<sup>−23</sup> J/K||style="text-align:center"|2019
|-
|style="text-align:center"|''N''<sub>A</sub>||Avogadros konstantur||style="text-align:center"|6,022&#8239;140&#8239;76&#8239;×&#8239;10<sup>23</sup> mol<sup>−1</sup>||style="text-align:center"|2019
|}

Vend aftur til Millumtjóða eindarskipanin.

Heintað frá "https://fo.wikipedia.org/wiki/Millumtjóða_eindarskipanin"