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File:Hafele–Keating experiment.jpg

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Hafele–Keating_experiment.jpg (273 × 364 pixels, file size: 24 KB, MIME type: image/jpeg)

Summary

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Media data and Non-free use rationale
Description Hafele–Keating experiment, showing the physicists sitting with their atomic clocks and a stewardess aboard a commercial airliner
Author or
copyright owner
unknown, not credited in the magazine
Source (WP:NFCC#4) Original publication: From Popular Mechanics, January 1972, p. 30

Immediate a scan of a paper copy of the magazine

Date of publication January 1972
Use in article (WP:NFCC#7) Hafele–Keating experiment
Purpose of use in article (WP:NFCC#8) This is a photo showing a historically important scientific experiment, which is the subject of the article.
Not replaceable with
free media because
(WP:NFCC#1)
It's a photo of a historic experiment in progress.
Minimal use (WP:NFCC#3) It's only one image, it's only being used in one article, and it's at low resolution.
Respect for
commercial opportunities
(WP:NFCC#2)
There is no competing market for the photo. The copyright may not even belong to Popular Mechanics, which did not include a copyright or photo credit in the magazine for this photo. Popular Mechanics does not sell back issues from 1972.
Fair useFair use of copyrighted material in the context of Hafele–Keating experiment//en.wikipedia.org/wiki/File:Hafele%E2%80%93Keating_experiment.jpgtrue

Licensing

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File history

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Date/TimeThumbnailDimensionsUserComment
current22:04, 2 January 2018Thumbnail for version as of 22:04, 2 January 2018273 × 364 (24 KB)DatBot (talk | contribs)Reduce size of non-free image (BOT - disable)
04:33, 23 August 2012No thumbnail300 × 400 (38 KB)Fashionslide (talk | contribs)Uploading a non-free file using File Upload Wizard

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