Image:Ferrofluid Magnet under glass.jpg

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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.
Source

By uploader
Date

2006-07-09
Author

Gregory F. Maxwell <gmaxwell@gmail.com> PGP:0xB0413BFA
Permission
(Reusing this image)

GFDL-1.2

Related images

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
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 "Text of the GNU Free Documentation License."

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File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeDimensionsUserComment
current04:03, 1 August 20062,048×1,536 (516 KB)Gmaxwell (Now high resolution.)
04:09, 13 July 2006800×600 (109 KB)Gmaxwell (Reverted to earlier revision)
04:07, 13 July 2006800×601 (114 KB)Gmaxwell (Reverted to earlier revision)
02:17, 12 July 2006800×600 (109 KB)Gmaxwell (fix size so mediawiki doesn't crap it up.)
02:06, 12 July 2006800×601 (114 KB)Gmaxwell ({{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}} )