File:NIST-4 Kibble balance.jpg

Original file (4,832 × 6,720 pixels, file size: 15.68 MB, MIME type: image/jpeg)

Summary

Description
English: The NIST-4 Kibble balance, which began full operation in early 2015 at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, United States, measured Planck's constant to within 13 parts per billion in 2017, which was accurate enough to assist with the redefinition of the kilogram planned for 2019.
Date
Source https://www.nist.gov/image/nist4wattbalancejpg
Author Jennifer Lauren Lee, for the U.S. National Institute of Standards and Technology (NIST)
Camera location39° 07′ 58.43″ N, 77° 12′ 56.6″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

Licensing

Public domain
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 of Title 17, Chapter 1, Section 105 of the US Code.
Warning: this does not include Standard Reference Data, as per Standard Reference Data Act (P.L. 90-396; 15 U.S.C. 290-290f) which may be copyrighted by the NIST.

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copyright status

public domain

applies to jurisdiction: United States
determination method or standard: work of the federal government of the United States

inception

1 September 2015

coordinates of the point of view

39°7'58.429"N, 77°12'56.599"W

captured with

Nikon D800

media type

image/jpeg

ISO speed

1,600

exposure time

0.1 second

f-number

8

focal length

32 millimetre

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Date/TimeThumbnailDimensionsUserComment
current20:34, 10 September 2017Thumbnail for version as of 20:34, 10 September 20174,832 × 6,720 (15.68 MB)BirdfernUser created page with UploadWizard

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allikas: https://en.wikipedia.org/wiki/File:NIST-4_Kibble_balance.jpg