File:Snowflake 300um LTSEM Edited.jpg
Original file (2,400 × 1,600 pixels, file size: 1,023 KB, MIME type: image/jpeg)
Captions
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Downsampled to 2400x1600, unsharpened mask, sharpened.. The original can be viewed here: Snowflake 300um LTSEM.jpg: . Modifications made by Atoma.
|
Low temperature scanning electron microscope [1] archive copy at the Wayback Machine magnification series, from 93x to 36,000x magnification series, of a snow crystal.
Most samples of snow crystals are observed by researchers at relatively moderate magnifications (30X-500X), however the capabilities of the electron microscope allow observation of fine structures at over 100,000X. The following set of photographs demonstrates a magnification series using a low temperature scanning electron microscope (LT-SEM) covering this range. By contrast, the light microscope is only capable of viewing meaningful details at magnifications of about 1,000X and is very limited in depth of field. Snow samples are very fragile and exposure to the light necessary to photograph them, using light microscopes, can change structures and even melt them. Using LT-SEM, samples are frozen to temperatures below -170 degrees Centigrade where they can be placed in a vacuum and observed for many hours with no structural changes. These photographs show the extraordinary symmetry of snow crystals even at high magnification. Magnification bars are accurate but X factors (lower left) are for 8"x10" prints.
Source: http://www.anri.barc.usda.gov/
Public domainPublic domainfalsefalse |
This image is in the public domain because it contains materials that originally came from the Agricultural Research Service, the research agency of the United States Department of Agriculture.
العربية ∙ dansk ∙ Deutsch ∙ English ∙ español ∙ فارسی ∙ français ∙ italiano ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ português ∙ sicilianu ∙ Türkçe ∙ Tiếng Việt ∙ 中文 ∙ +/− |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 21:14, 15 February 2007 | 2,400 × 1,600 (1,023 KB) | Atoma (talk | contribs) | {{RetouchedPicture|Downsampled to 2400x1600, unsharpened mask, sharpened.|orig=Snowflake 300um LTSEM.jpg|editor=Atoma}} Low temperature scanning electron microscope [http://www.anri.barc.usda.gov/emusnow/4100/4100.htm] magnification series, from 93x to |
You cannot overwrite this file.
File usage on Commons
The following 2 pages use this file:
File usage on other wikis
The following other wikis use this file:
- Usage on ca.wikibooks.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Width | 5,400 px |
---|---|
Height | 3,600 px |
Bits per component | 8 |
Compression scheme | Uncompressed |
Pixel composition | Black and white (Black is 0) |
Orientation | Normal |
Number of components | 1 |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Software used | Adobe Photoshop CS2 Windows |
File change date and time | 05:27, 3 January 2006 |
Color space | Uncalibrated |