File:Ferrofluid Magnet under glass.jpg

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Original file (2,048 × 1,536 pixels, file size: 516 KB, MIME type: image/jpeg)

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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.
Русский: Ферромагнитная жидкость на стекле под воздействием магнита под стеклом.
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Author Gregory F. Maxwell <gmaxwell@gmail.com> PGP:0xB0413BFA
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(Reusing this file)
I, the copyright holder of this work, hereby publish it under the following license:
GNU head 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 GNU Free Documentation License. 1.2 only
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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.

Equipment
Canon 5D
10mm/f2.85 Macro at f/200
ISO 100, 10 second exposure
Background illumination provided by 2400watts of 65K high-cri fluorescent. Highlight illumination by photoflash reflected off a 40ft x 15 ft white matt panel.
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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Date/TimeThumbnailDimensionsUserComment
current04:03, 1 August 2006Thumbnail for version as of 04:03, 1 August 20062,048 × 1,536 (516 KB)Gmaxwell (talk | contribs)Now high resolution.
04:09, 13 July 2006Thumbnail for version as of 04:09, 13 July 2006800 × 600 (109 KB)Gmaxwell (talk | contribs)Reverted to earlier revision
04:07, 13 July 2006Thumbnail for version as of 04:07, 13 July 2006800 × 601 (114 KB)Gmaxwell (talk | contribs)Reverted to earlier revision
02:17, 12 July 2006Thumbnail for version as of 02:17, 12 July 2006800 × 600 (109 KB)Gmaxwell (talk | contribs)fix size so mediawiki doesn't crap it up.
02:06, 12 July 2006Thumbnail for version as of 02:06, 12 July 2006800 × 601 (114 KB)Gmaxwell (talk | contribs){{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 }} {{GFDL-1.2}}

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