Image:Ferrofluid Magnet under glass edit.jpg
维基百科，自由的百科全书
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Edited by Fir0002
| Description |
English: Ferrofluid on a reflective glass plate under the influence of a strong/steep magnetic field.
עברית: he:נוזל מגנטי אשר נמצא על זכוכית משקפת תחת השפעת מגנט חזק.
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By uploader |
| Date |
2006-07-09 |
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| Permission (Reusing this image) |
GFDL-1.2 |
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Ferrofluid, a paramagnetic fluid composed of nanoscale ferromagnetic particles suspended in a carrier fluid, was placed onto a glass plate. The edges of the glass plate are visible at the bottom of the image. A powerful N40 neodymium magnet was placed under the glass along with an iron rod to steepen the field. Spikes form, in a phenomenon called normal field instability, where the magnetic forces are great enough to overcome gravity and surface tension to align the fluid in a magnetically ideal manner.
[edit] Equipment
- Canon 5D
- 100mm/f2.8 Macro at f/20
- ISO 100, 1 second exposure
- Background illumination provided by 240watts of 6500K high-cri fluorescent. Highlight illumination by photoflash reflected off a 4ft x 1.5 ft white matt panel.
[edit] Processing
- RAW to 16bit conversion with dcraw
- Slight rotation
- Cropping to 4:3 aspect
- Gain to bring background to white.
- Minor cloning to remove sensor dust from background area
- Scaled to 2048x1536
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 only as 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 "Text of the GNU Free Documentation License."
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| 日期／时间 | 维度 | 用户 | 注解 | |
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| 当前 | 2006年10月29日 (日) 02:47 | 1,886×1,296 (335 KB) | Fir0002 | ({{Information |Description=Ferrofluid on glass, with a rare earth magnet. |Source=By uploader. |Date=2006-07-09 |Author=Gregory F. Maxwell |Permission=GFDL-1.2 only }} Edited by Fir0002 {{GFDL-1.2}} Category:Electromagnetism) |
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