File:Eiskristall 01.jpg
Jump to navigation
Jump to search
Size of this preview: 800 × 533 pixels. Other resolutions: 320 × 213 pixels | 640 × 427 pixels | 1,024 × 683 pixels | 1,280 × 853 pixels | 2,560 × 1,707 pixels | 3,315 × 2,210 pixels.
Original file (3,315 × 2,210 pixels, file size: 1.51 MB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary[edit]
| Description |
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 |
Licensing[edit]
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution 4.0 International 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.
 |
This image was uploaded as part of Wiki Science Competition 2017. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:07, 23 November 2017 | | 3,315 × 2,210 (1.51 MB) | Larry-pilot (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
The following 3 pages use this file:
File usage on other wikis
The following other wikis use this file:
- Usage on uk.wikipedia.org
