Imago:Platinum-Iridium meter bar.jpg - Vicipaedia

# Imago:Platinum-Iridium meter bar.jpg

### E Vicipaedia

- Imago
- Historia imaginis
- Nexus ad imaginem

Platinum-Iridium_meter_bar.jpg‎ (22KB, MIME type: `image/jpeg`)

| Hoc est documentum ex Wikimedia Commons. Vide eius descriptionem apud Commons ut plura discas.

International Prototype Metre standard bar made of platinum-iridium. 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 in a vaccuum. (NIST)

http://www.mel.nist.gov/div821/webdocs-14/lsi_2.htm

| This image is in the public domain because it contains materials that originally came from the National Institute of Standards and Technology. |

## Nexus ad imaginem

Paginae insequentes huic imagini nectunt:

- Metrum

Receptum de "http://la.wikipedia.org../../../p/l/a/Imago%7EPlatinum-Iridium_meter_bar.jpg_bf3c.html"

##### Views

- Imago
- Disputatio
- Emendatio recentissima

##### Quaerere