File:Christiaan Huygens Clock and Horologii Oscillatorii.jpg
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DescriptionChristiaan Huygens Clock and Horologii Oscillatorii.jpg |
English: One of the first pendulum clocks designed by Christiaan Huygens, and his treatise on the pendulum, Horologium Oscillatorium published in 1673, on display in Museum Boerhaave in Leiden, Netherlands. This may be Huygens's second pendulum clock, which was also finished in 1673 and is shown on the open page of the book. In it, Huygens demonstrated how to make the swing of the pendulum isochronous using "cycloidal" cheeks of metal (shown on page) to confine the suspension cord and give the pendulum a cycloidal trajectory. Huygens claimed an accuracy of 10 seconds per day. |
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Source | https://www.flickr.com/photos/koopmanrob/3775343287/sizes/o/ |
Author | Rob Koopman (Flickr profile) |
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current | 15:46, 1 May 2010 | 3,413 × 1,641 (673 KB) | Erik Zachte (talk | contribs) | {{Information |Description={{en|1=Christiaan Huygens: Clock and Horologii Oscillatorii at display in Museum Boerhaave in Leiden - Netherlands}} |Source=http://www.flickr.com/photos/koopmanrob/3775343287/sizes/o/ |Author=Rob Koopman ([http://www.flickr.com |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D700 |
Author | ROB KOOPMAN |
Copyright holder | ROB KOOPMAN |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/4 |
ISO speed rating | 3,200 |
Date and time of data generation | 13:59, 26 July 2009 |
Lens focal length | 105 mm |
Orientation | Normal |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Software used | Adobe Photoshop CS3 Windows |
File change date and time | 22:24, 31 July 2009 |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 13:59, 26 July 2009 |
APEX shutter speed | 4.906891 |
APEX aperture | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 50 |
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DateTimeDigitized subseconds | 50 |
Color space | Uncalibrated |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 105 mm |
Scene capture type | Standard |
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Subject distance range | Unknown |