Image:BiodegradablePlasticUtensils1.jpg
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| 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.
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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 |
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| Other versions |
Image:BiodegradablePlasticUtensils.jpg (original) |
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This is a featured picture on Wikimedia Commons. We believe it is one of the finest images on Commons. 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:
Français : Fourchettes, couteaux et cuillères biodégradables, en polyester à base d'amidon.
Español: Cuchillos, tenedores y cucharas realizados a partir de material biodegradable.
Беларуская: Сталовыя прыборы, вырабленыя з біяраскладальнага крухмал-палістыролу.
Česky: Jídelní příbory vyrobené z polymerních biodegradabilních materiálů
Español: Cuchillos, tenedores y cucharas realizados a partir de material biodegradable.
Suomi: Luonnossa hajoavasta materiaalista valmistettuja veitsiä, haarukoita ja lusikoita
Français : Fourchettes, couteaux et cuillères biodégradables, en polyester à base d'amidon.
Magyar : Evőeszközök biológiailag lebomló poliészterből
Nederlands: Messen, vorken en lepels gemaakt van een organisch zetmeel-polyestermateriaal. Foto gemaakt met de foto-elasticimetriemethode.
Polski: Noże, łyżki i widelce wykonane z materiałów biodegradowalnych.
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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