Description Ferrofluid Magnet under glass.jpg	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.
Date	9 July 2006
Source	Own work
Author	Gregory F. Maxwell < [email protected] > PGP : 0xB0413BFA
Permission ( Reusing this file )	I, the copyright holder of this work, hereby publish it under the following license: 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 http://www.gnu.org/licenses/old-licenses/fdl-1.2.html GFDL 1.2 GNU Free Documentation License 1.2 true true
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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