Langbahn Team – Weltmeisterschaft

File:EastHanSeismograph.JPG

EastHanSeismograph.JPG (480 × 552 pixels, file size: 232 KB, MIME type: image/jpeg)

Summary

Description
English: A replica of an ancient Chinese Seismograph from Eastern Han Dynasty (25-220 CE).
This picture is taken from an exhibition at Chabot Space & Science Center in Oakland, California.
The plaque of the exhibit said:
Detecting a Quake
In 132 CE, after several earthquakes in China, astronomer Zhang Heng invented this instrument to warn people of the next one. When the ground shook, it moved a pendulum inside the jug. The pendulum pushed a lever that opened one dragon's mouth. A ball rolled out and into the toad's mouth below, sounding an alarm. The open dragon mouth pointed in the direction of the earthquake, notifying the Emperor.
Date
Source en:File:EastHanSeismograph.JPG
Author en:user: Kowloonese

Licensing

GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
w:en:Creative Commons
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Original upload log

The original description page was here. All following user names refer to en.wikipedia.

Upload date | User | Dimensions | Comment
04:08, 12 July 2004 |480 × 585 (87 KB) | Kowloonese (talk | contribs) | Ancient Chinese Siesmograph from Eastern Han Dynasty

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copyrighted

copyright license

GNU Free Documentation License, version 1.2 or later

Creative Commons Attribution-ShareAlike 3.0 Unported

inception

July 2004

exposure time

0.03333333333333333333 second

f-number

2.8

focal length

8 millimetre

ISO speed

320

media type

image/jpeg

instance of

photograph

File history

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Date/TimeThumbnailDimensionsUserComment
current13:10, 10 January 2014Thumbnail for version as of 13:10, 10 January 2014480 × 552 (232 KB)SoerfmLevels, crop
13:10, 10 January 2014Thumbnail for version as of 13:10, 10 January 2014480 × 552 (232 KB)SoerfmLevels, crop
14:33, 25 March 2005Thumbnail for version as of 14:33, 25 March 2005480 × 585 (87 KB)ShizhaoA replica of an ancient Chinese Siesmograph from Eastern Han Dynasty (25-220 CE) This picture was taken in July 2004 from an exhibition at Chabot Space & Science Center in Oakland California. The plaque of the exhibit said: <b>Detecting a Quake</b> <br>

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Quelle: http://en.wikipedia.org/wiki/File:EastHanSeismograph.JPG