Image:Crushed rod pollock barraclough.jpg
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| Description |
A photograph of a section of the crushed lightning rod first described by J.A. Pollock and S. Barraclough, 1905, Proc. R. Soc. New South Wales 39, 131. They correctly described the crushing mechanism as a result of the interaction of the large current flowing in the conductor with its own magnetic field. |
|---|---|
| Source |
Historical collection of the School of Physics, University of Sydney, Australia |
| Date |
- |
| Author |
Assoc. Prof Brian James |
| Permission (Reusing this image) |
- |
 |
Brian James, the creator of this work, has granted (or hereby grants) permission 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." |
File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 07:04, 29 August 2007 | 480×1,552 (130 KB) | Oz tangles (Talk | contribs) | (author: Brian James photographer: Brian James organisation: School of Physics, University of Sydney, Australia licensing: the author of this work has given me permission to release this image into the public domain under the GFDL license. Description: A) |
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Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
| Camera manufacturer | Canon |
|---|---|
| Camera model | Canon PowerShot A85 |
| Exposure time | 1/60 sec (0.016666666666667) |
| F-number | f/2.8 |
| Date and time of data generation | 15:47, 20 April 2007 |
| Lens focal length | 5.40625 mm |
| Orientation | Normal |
| Horizontal resolution | 72 dpi |
| Vertical resolution | 72 dpi |
| Software used | QuickTime 7.1.3 |
| File change date and time | 22:38, 20 April 2007 |
| Y and C positioning | 1 |
| Exif version | 2.2 |
| Date and time of digitizing | 15:47, 20 April 2007 |
| Image compression mode | 3 |
| Shutter speed | 5.90625 |
| Aperture | 2.96875 |
| Exposure bias | 0 |
| Maximum land aperture | 2.96875 |
| Metering mode | Pattern |
| Flash | 89 |
| Color space | sRGB |
| Focal plane X resolution | 10819.047619048 |
| Focal plane Y resolution | 10784.810126582 |
| Focal plane resolution unit | inches |
| 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 |
| Scene capture type | Standard |
