Изображение:Ferrofluid large spikes.jpg
Материал из Википедии — свободной энциклопедии
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| Description |
Ferrofluid on a reflective glass plate under the influence of a strong/steep magnetic field. |
|---|---|
| Source |
By uploader |
| Date |
2006-07-10 04:12:22 UTC |
| Author |
Gregory F. Maxwell |
| Permission |
GFDL-1.2 |
| Other versions | Image:Ferrofluid_Magnet_under_glass.jpg Image:Ferrofluid_large_spikes2.jpg Image:Ferrofluid_poles.jpg |
| Related images |
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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, 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.
[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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This image was selected as a picture of the day for November 9, 2006. It was captioned as followed:
English: Ferrofluid, a paramagnetic fluid composed of nanoscale ferromagnetic particles suspended in a carrier fluid
Deutsch: Ferrofluid, eine auf magnetische Felder reagierende Flüssigkeit bestehend aus Nanometer großen magnetischen Partikeln, die in einer Trägerflüssigkeit suspendiert sind.
Français : Un ferrofluide, fluide fortement polarisé sous l'effet d'un champ magnétique.
Español: Ferrofluido, un líquido paramagnético compuesto por partículas ferromagnéticas suspendidas en un fluido.
Asturianu: Fierrofluidu, un fluidu paramagnéticu compuestu por partícules ferromagnétiques suspendíes nun fluidu.
Česky: Ferrofluidní kapalina sestávající z mikroskopických ferromagnetických částeček uvězněných v nosné kapalině
Deutsch: Ferrofluid, eine auf magnetische Felder reagierende Flüssigkeit bestehend aus Nanometer großen magnetischen Partikeln, die in einer Trägerflüssigkeit suspendiert sind.
English: Ferrofluid, a paramagnetic fluid composed of nanoscale ferromagnetic particles suspended in a carrier fluid
Esperanto: Ferofluidaĵo estas paramagneta likvaĵo el nanometraj magnetaj metaleroj naĝantaj en fluidaĵo
Español: Ferrofluido, un líquido paramagnético compuesto por partículas ferromagnéticas suspendidas en un fluido.
Français : Un ferrofluide, fluide fortement polarisé sous l'effet d'un champ magnétique.
Galego: Ferrofluído, un líquido paramagnético composto por partículas ferromagnéticas suspendidas nun fluído.
Magyar : Ferrofluid, egy paramagnetikus folyadék, amely hordozófolyadékban oldott nanoméretű ferromagnetikus részecskékből áll
Italiano: Ferrofluid, un liquido paramagnetico composto di particelle ferromagnetiche sospese in un liquido.
日本語: 媒介液に浮いた、ナノ・スケールの強磁性粒子から成る磁性流体
Norsk (nynorsk): Ferrofluid er ei paramagnetisk væske.
Polski: Ferrofluid - ciecz będąca zawiesiną ferromagnetycznych cząstek, wykazująca bardzo silne reakcje w obecności pola magnetycznego.
Русский: Ферромагнитная жидкость - парамагнитная жидкость, состоящая из ферромагнитных наночастиц, взвешенных в несущей жидкости
Svenska: Ferrofluid är en paramagnetisk vätska.
zh-hans: 磁流体，一种含有纳米级的铁磁体颗粒的液体。
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This featured picture is fairly large and has an aspect ratio of 4:3 or 5:4, making it suitable as a computer wallpaper.
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