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

Summary

DescriptionEastHanSeismograph.JPG
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/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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
w:en:Creative Commons
attribution share alike 		This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license. And indicate if changes were made. You may do so in any reasonable manner. But not in any way that suggests the licensor endorses you. Or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue

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

Captions

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copyright status

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>

File usage

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Metadata

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Camera manufacturerSONY
Camera modelCYBERSHOT
Exposure time1/30 sec (0.033333333333333)
F-numberf/2.8
ISO speed rating320
Date and time of data generation11:40, 10 July 2004
Lens focal length8 mm
OrientationNormal
Horizontal resolution72 dpi
Vertical resolution72 dpi
Software usedAdobe Photoshop CS2 Windows
File change date and time14:09, 10 January 2014
Y and C positioningCo-sited
Pair of black and white reference values
  • 0
  • 255
  • 128
  • 255
  • 128
  • 255
Exposure ProgramNormal program
Exif version2.2
Date and time of digitizing11:40, 10 July 2004
Meaning of each component
  1. Y
  2. Cb
  3. Cr
  4. does not exist
Exposure bias0
Maximum land aperture3 APEX (f/2.83)
Metering modePattern
Light sourceUnknown
FlashFlash did not fire
Supported Flashpix version1
Color spacesRGB
File sourceDigital still camera
Scene typeA directly photographed image
Custom image processingNormal process
Exposure modeAuto exposure
White balanceAuto white balance
Scene capture typeStandard
Supported Flashpix version1
Image width480 px
Image height552 px
Date metadata was last modified15:09, 10 January 2014
IIM version2

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