File:Eiskristall 03.jpg
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[edit]DescriptionEiskristall 03.jpg |
Deutsch: Auf dem Bild ist ein Raureifkristall auf den dünnen Fasern von Wolle zu sehen. Dieser hat sich durch einen Windstoss vom Baum gelöst und wurde mit der Wolle aufgefangen. Mit einem Makroobjektiv konnten die feinen Kristallstrukturen sehr präzise festgehalten werden. Die Fotografie musste schnell entstehen, denn noch bevor der Raureifkristall begann zu schmelzen. Aus diesem Grund mussten auch die Aussentemperaturen für längere Zeit unter dem Gefrierpunkt bleiben. Das Bild wurde am frühen Morgen aufgenommen, kurz bevor die Sonne hinter den Bergen hervor schien.
Eiskristalle entstehen durch den direkten Übergang vom gasförmigen in den kristallinen Zustand. Diesen Vorgang nennt man Resublimation. Im festen Aggregatszustand bilden die H2O-Moleküle ein Kristallgitter. Sechs Wasserstoffmoleküle schliessen sich durch Wasserstoffbrücken zu einem Ring zusammen. Es sind nur Winkel von 60° bzw. 120° möglich. Dadurch bildet sich die hexagonale Symmetrie, die auch im Bild sichtbar ist. Die Formen hängen von der herrschenden Temperatur sowie der Luftfeuchtigkeit ab. Obwohl Eiskristalle transparent sind, wird das Licht in allen sichtbaren Wellenlängen reflektiert und gestreut. English: The picture shows a rime crystal on the thin fibers of wool. It fell of a tree by the gust of wind and was caught with wool. With a macro lens, the fine crystal structures could be captured very precisely. The photograph had to be taken quickly, before the rime crystal began to melt. For this reason, the outside temperatures had to stay below freezing point for a longer period of time. The picture was taken in the early morning just before the sun rose behind the mountains. Ice crystals are formed by the direct transition from the gaseous to the crystalline state. This process is called resublimation. In the solid state of aggregation, the H2O molecules form a crystal lattice. Six hydrogen molecules join together by hydrogen bonding to form a ring. Only angles of 60 ° or 120 ° are possible. This forms the hexagonal symmetry, which is also visible in the image. The shapes depend on the prevailing temperature and the humidity. Although ice crystals are transparent, the light is reflected and scattered in all visible wavelengths. |
Date | |
Source | Own work |
Author | Larry-pilot |
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[edit]I, the copyright holder of this work, hereby publish it under the following license:
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This image was uploaded as part of Wiki Science Competition 2017. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:07, 23 November 2017 | 4,016 × 2,857 (4.18 MB) | Larry-pilot (talk | contribs) | User created page with UploadWizard |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
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Camera model | Canon EOS 600D |
Exposure time | 1/125 sec (0.008) |
F-number | f/2.8 |
ISO speed rating | 125 |
Date and time of data generation | 12:16, 22 January 2017 |
Lens focal length | 100 mm |
Width | 5,184 px |
Height | 3,456 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS6 (Macintosh) |
File change date and time | 13:41, 2 April 2017 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 12:16, 22 January 2017 |
Meaning of each component |
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APEX shutter speed | 7 |
APEX aperture | 3 |
APEX exposure bias | 0.33333333333333 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Spot |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 86 |
DateTimeOriginal subseconds | 86 |
DateTimeDigitized subseconds | 86 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 5,728.1767955801 |
Focal plane Y resolution | 5,808.4033613445 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
Serial number of camera | 163066106026 |
Lens used | EF100mm f/2.8L Macro IS USM |
Rating (out of 5) | 0 |
Date metadata was last modified | 15:41, 2 April 2017 |
Unique ID of original document | 372DB766D9C5D7221F29F4B2F52D1A5D |