Imagine:BiodegradablePlasticUtensils1.jpg
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[edit] Summary
| Description |
English: Knives, forks, and spoons made from a biodegradable starch-polyester material.
The photo has been realized using the photoelasticity method, an experimental method which gets a fairly accurate picture of stress distribution even around abrupt discontinuities in a material. When a ray of plane polarised light is passed through a photoelastic material, it gets resolved along the two principal stress directions and each of these components experiences different refractive indices. The difference in the refractive indices leads to a relative phase retardation between the two component waves. The setup used to photograph this photo was probably composed of:
Light and camera being installed and oriented in the same direction, the two quarter-wave plates were turned with the polarizing axis in the same direction.Français : Couteaux, fourchettes et cuillères biodégradables en polyester à base d'amidon.
Português: Facas, garfos e colheres fabricadas com um material poliéster biodegradável à base de amido. A foto foi tirada usando o método fotoelástico, um método experimental que fornece uma imagem bastante precisa da distribuição do stress mesmo que o material possua descontinuidades abruptas.
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| Source |
United States Department of Agriculture (link) |
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| Date |
unknown |
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| Author |
Scott Bauer |
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| Permission (Reusing this image) |
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[edit] Awards
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This file was a candidate on Picture of the Year 2007. This is a featured picture on Wikimedia Commons: it is considered one of our finest images. If you have an image of similar quality that can be published under a suitable copyright license, be sure to upload it, tag it, and nominate it. |
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This image was selected as a picture of the day for April 06, 2007. It was captioned as followed:
Česky: Jídelní příbory vyrobené z polymerních biodegradabilních materiálů
Suomi: Luonnossa hajoavasta materiaalista valmistettuja veitsiä, haarukoita ja lusikoita
Magyar: Evőeszközök biológiailag lebomló poliészterből
Nederlands: Messen, vorken en lepels gemaakt van een organisch zetmeel-polyestermateriaal. Foto gemaakt met de foto-elasticimetriemethode.
Русский: Ножи, вилки и ложки, изготовленные из разлагаемого микроорганизмами полиэстера на основе крахмала.
Slovenčina: Jedálne príbory vyrobené z polymérnych biodegradabilných materiálov
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | Usator | Comment | |
|---|---|---|---|---|
| current | 21:51, 22 april 2007 | 2,700×1,757 (559 KB) | 17Drew | (darkened background) |
| 18:14, 14 februario 2007 | 2,700×1,757 (1.96 MB) | 17Drew | ({{Information |Description=knives, forks, and spoons made from a biodegradable starch-polyester material |Source=United States Department of Agriculture ([http://www.ars.usda.gov/is/graphics/photos/k7245-1.htm link])<br>noise removed with a Gaussian blur ) |
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