File:Iron Pillar of Delhi.jpg
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Summary
[edit]DescriptionIron Pillar of Delhi.jpg |
English: The Iron Pillar located in Delhi, India, is a 7 m (23 ft) column in the Qutab complex, notable for the rust-resistant composition of the metals used in its construction.
The pillar has attracted the attention of archaeologists and materials scientists because of its high resistance to corrosion, and has been called a "testimony to the high level of skill achieved by the ancient Indian iron smiths in the extraction and processing of iron." The corrosion resistance results from an even layer of crystalline iron hydrogen phosphate hydrate forming on the high phosphorus content iron, which serves to protect it from the effects of the local Delhi climate. The pillar weighs over 6,000 kg (13,000 lb), and is thought to have originally been erected in what is now Udayagiri by one of the Gupta monarchs in approximately 402 CE, though the precise date and location are a matter of dispute. |
Date | |
Source | Own work |
Author | Rounik Ghosh |
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current | 19:55, 8 March 2017 | 4,608 × 3,456 (5.79 MB) | Rounikk97 (talk | contribs) | User created page with UploadWizard |
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Metadata
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Camera manufacturer | SONY |
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Camera model | DSC-W710 |
Exposure time | 1/400 sec (0.0025) |
F-number | f/3.2 |
ISO speed rating | 100 |
Date and time of data generation | 00:19, 31 December 2013 |
Lens focal length | 5 mm |
Orientation | Normal |
Horizontal resolution | 350 dpi |
Vertical resolution | 350 dpi |
File change date and time | 00:19, 31 December 2013 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 00:19, 31 December 2013 |
Meaning of each component |
|
Image compression mode | 3 |
APEX exposure bias | 0 |
Maximum land aperture | 3.4 APEX (f/3.25) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Landscape |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |