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File:Ferrofluid large spikes.jpg

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Original file ‎(2,048 × 1,536 pixels, file size: 370 KB, MIME type: image/jpeg)

Description
English: Ferrofluid on a reflective glass plate under the influence of a strong/steep magnetic field.
Français : Ferrofluide sur une plaque reflectrice en verre et sous l'influence d'un fort champ magnétique.
עברית: he:נוזל מגנטי אשר נמצא על זכוכית משקפת תחת השפעת מגנט חזק.
Date UTC
Source Own work
Author Gregory F. Maxwell <gmaxwell@gmail.com> PGP:0xB0413BFA
Permission
(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
Other versions
English: 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
  • 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, additional highlight illumination provided by a distant tungsten light and a set of deep violet LEDs at offset angles to preserve an appearance of depth otherwise lost in the 2D image.

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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depicts

inception

10 July 2006

File history

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Date/TimeThumbnailDimensionsUserComment
current23:19, 9 August 2006Thumbnail for version as of 23:19, 9 August 20062,048 × 1,536 (370 KB)FuttiReverted to earlier revision
23:19, 9 August 2006Thumbnail for version as of 23:19, 9 August 2006800 × 517 (92 KB)FuttiReverted to earlier revision
21:11, 29 July 2006Thumbnail for version as of 21:11, 29 July 20062,048 × 1,536 (370 KB)GmaxwellHigher resolution version.
02:21, 12 July 2006Thumbnail for version as of 02:21, 12 July 2006800 × 517 (92 KB)Gmaxwell{{Information |Description=Ferrofluid under the influence of a strong/steep magnetic field. |Source=By uploader |Date=2006-07-10 |Author=Gregory F. Maxwell |Permission=GFDL-1.2 }} Only low res copy contributed for now to avoid quality problems on the ima

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