 Size of this preview: 800 × 585 pixelsFull resolution? (1,400 × 1,024 pixels, file size: 523 KB, MIME type: image/jpeg)
| Description |
A computer-generated image of the International Prototype kilogram (IPK), which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of 39.17 mm. The IPK is kept at the Bureau International des Poids et Mesures (International Bureau of Weights and Measures) in Sèvres on the outskirts of Paris.
The geometry of this computer model was based on the actual specifications being used for experiments in new manufacturing techniques to produce new kilogram mass standards.
This image was provided by the contributor because of the dearth of uncopyrighted photographs of the actual IPK. This is expected to be a chronic limitation given that…
- the IPK is stored in a vault nearly all the time,
- there is no general public access to the BIPM (and certainly none to the vault),
- and working copies of the IPK are used at the BIPM for routine calibrations for years on-end.
|
| Source |
Originally uploaded to English Wikipedia as CGKilogram.jpg
|
| Date |
Uploaded August 10, 2007
|
| Author |
en:User:Greg L
|
Permission
(Reusing this image) |
|
Upload log
- 19:00, August 10, 2007 . Greg L . 1400×1024 (535,748 bytes)
- 08:30, August 10, 2007 . Greg L . 1024×740 (128,856 bytes) (A computer-generated image of the international prototype of the kilogram, which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of [[1 E-2 m|39 )
File historyClick on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment |
|---|
| current | 14:32, 11 August 2007 | 1,400×1,024 (523 KB) | EPO | |
File links
The following pages on the English Wikipedia link to this file (pages on other projects are not listed):
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
| |
