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<h1 class="firstHeading">Image:BiodegradablePlasticUtensils2.jpg</h1>
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<h3 id="siteSub">Un article de Wikipédia, l'encyclopédie libre.</h3>
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<li><a href="#file">Image</a></li>
<li><a href="#filehistory">Historique du fichier</a></li>
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</ul><div class="fullImageLink" id="file"><a href="http://upload.wikimedia.org/wikipedia/commons/7/7d/BiodegradablePlasticUtensils2.jpg"><img alt="Image:BiodegradablePlasticUtensils2.jpg" src="../../../../images/shared/thumb/7/7d/BiodegradablePlasticUtensils2.jpg/800px-BiodegradablePlasticUtensils2.jpg" width="800" height="552" border="0" /></a><br /><small>Taille de cet aperçu : 800 × 552 pixels</small><br /><a href="../../../../images/shared/7/7d/BiodegradablePlasticUtensils2.jpg">Image en plus haute résolution</a> (2 548 × 1 757 pixels, taille du fichier : 420 Kio, type MIME : image/jpeg)</div><div class='sharedUploadNotice'><div style="clear:both;"></div>
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</td><td> Ce fichier provient de Wikimedia Commons<sup><a href="http://commons.wikimedia.org/wiki/Accueil" class="extiw" title="commons:Accueil">?</a></sup>. Les <b><a href="http://commons.wikimedia.org/wiki/Image:BiodegradablePlasticUtensils2.jpg?uselang=fr" class="external text" title="http://commons.wikimedia.org/wiki/Image:BiodegradablePlasticUtensils2.jpg?uselang=fr" rel="nofollow">informations le concernant</a></b> sont affichées ci-dessous <span style="font-size:xx-small">(<a href="../../../../articles/i/m/p/Aide%7EImporter_un_fichier_sur_Commons_06c9.html" title="Aide:Importer un fichier sur Commons">procédure</a>)</span>.
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Ci-dessous, retrouvez <a href="http://commons.wikimedia.org/wiki/Image:BiodegradablePlasticUtensils2.jpg" class="external " title="http://commons.wikimedia.org/wiki/Image:BiodegradablePlasticUtensils2.jpg" rel="nofollow">page de description du fichier</a> provenant de Commons.</div><div id="shared-image-desc"><table cellspacing="8" cellpadding="0" style="clear:both; margin:0.5em auto; background-color:#FAF5E6; border:2px solid #E5D4A1;" width="100%">
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<td>This is a <b><a href="http://en.wikipedia.org/wiki/Wikipedia:Featured_pictures" class="extiw" title="w:Wikipedia:Featured_pictures">featured picture</a></b> on English Wikipedia and is <a href="http://en.wikipedia.org/wiki/Wikipedia:Featured_picture_candidates/Image:BiodegradablePlasticUtensils2.jpg" class="extiw" title="w:Wikipedia:Featured_picture_candidates/Image:BiodegradablePlasticUtensils2.jpg">considered</a> one of the finest images.<br />
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<th style="background: #ccf; text-align: right; vertical-align: top; padding-right: 0.4em; width: 15%" id="fileinfotpl_desc">Description</th>
<td>
<p>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.</p>
<p><br />
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.</p>
<p>The setup used to photograph this photo was probably composed of:</p>
<ul>
<li>A regular light source, with a quarter-wave plate installed to polarize the emerging light</li>
<li>A regular photo camera, with a quarter-wave plate installed in front of the lens</li>
</ul>
<p>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.</p>
</td>
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<tr valign="top">
<th style="background: #ccf; text-align: right; padding-right: 0.4em" id="fileinfotpl_src">Source</th>
<td>
<p>United States Department of Agriculture (<a href="http://www.ars.usda.gov/is/graphics/photos/k7245-1.htm" class="external text" title="http://www.ars.usda.gov/is/graphics/photos/k7245-1.htm" rel="nofollow">link</a>)<br />
cropped, noise removed with a Gaussian blur in The GIMP</p>
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<th style="background: #ccf; text-align: right; padding-right: 0.4em; white-space: nowrap" id="fileinfotpl_date">Date</th>
<td>
<p>unknown</p>
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<th style="background: #ccf; text-align: right; padding-right: 0.4em" id="fileinfotpl_aut">Author</th>
<td>
<p>Scott Bauer</p>
</td>
</tr>
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<th style="background: #ccf; text-align: right; padding-right: 0.4em" id="fileinfotpl_perm">Permission<br />
<small>(<a href="http://commons.wikimedia.org/wiki/Commons:Reusing_content_outside_Wikimedia" title="Commons:Reusing content outside Wikimedia">Reusing this image</a>)</small></th>
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<td><a href="http://commons.wikimedia.org/wiki/Image:PD-icon.svg" class="image" title="Public domain"><img alt="Public domain" src="http://upload.wikimedia.org/wikipedia/commons/thumb/6/62/PD-icon.svg/64px-PD-icon.svg.png" width="64" height="64" border="0" /></a></td>
<td><i>This image is a work of a <a href="http://en.wikipedia.org/wiki/United_States_Department_of_Agriculture" class="extiw" title="en:United_States_Department_of_Agriculture">United States Department of Agriculture</a> employee, taken or made during the course of the person's official duties. As a <a href="http://en.wikipedia.org/wiki/Work_of_the_United_States_Government" class="extiw" title="en:Work_of_the_United_States_Government">work</a> of the <a href="http://en.wikipedia.org/wiki/Federal_Government_of_the_United_States" class="extiw" title="en:Federal_Government_of_the_United_States">U.S. federal government</a>, the image is in the <b><a href="http://en.wikipedia.org/wiki/public_domain" class="extiw" title="w:public_domain">public domain</a></b>.</i></td>
<td><a href="http://commons.wikimedia.org/wiki/Image:USDA_logo.svg" class="image" title="USDA logo.svg"><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/thumb/0/0e/USDA_logo.svg/80px-USDA_logo.svg.png" width="80" height="55" border="0" /></a></td>
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<td>
<div class="gallerybox" style="width: 155px;">
<div class="thumb" style="padding: 34px 0; width: 150px;">
<div style="margin-left: auto; margin-right: auto; width: 120px;"><a href="http://commons.wikimedia.org/wiki/Image:BiodegradablePlasticUtensils1.jpg" class="image" title="BiodegradablePlasticUtensils1.jpg"><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/BiodegradablePlasticUtensils1.jpg/120px-BiodegradablePlasticUtensils1.jpg" width="120" height="78" border="0" /></a></div>
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<div class="gallerytext">
<p>noise removed, uncropped, Featured Picture</p>
</div>
</div>
</td>
<td>
<div class="gallerybox" style="width: 155px;">
<div class="thumb" style="padding: 34px 0; width: 150px;">
<div style="margin-left: auto; margin-right: auto; width: 120px;"><a href="http://commons.wikimedia.org/wiki/Image:BiodegradablePlasticUtensils.jpg" class="image" title="BiodegradablePlasticUtensils.jpg"><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/thumb/8/81/BiodegradablePlasticUtensils.jpg/120px-BiodegradablePlasticUtensils.jpg" width="120" height="78" border="0" /></a></div>
</div>
<div class="gallerytext">
<p>Original</p>
</div>
</div>
</td>
</tr>
</table>
<p><br /></p>
</td>
</tr>
</table>
<p><span id="field-description" title="Knives%2C+forks%2C+and+spoons+made+from+a+biodegradable+starch-polyester+material.%0AThe+photo+has+been+realized+using+the+photoelasticity+method%2C+an+experimental%0Amethod+which+gets+a+fairly+accurate+picture+of+stress+distribution+even+around+%0Aabrupt+discontinuities+in+a+material.%0A%0A%0AWhen+a+ray+of+plane+polarised+light+is+passed+through+a+photoelastic+material%2C+it+gets%0Aresolved+along+the+two+principal+stress+directions+and+each+of+these+components+experiences+%0Adifferent+refractive+indices.+The+difference+in+the+refractive+indices+leads+to+a+relative+%0Aphase+retardation+between+the+two+component+waves.%0A%0AThe+setup+used+to+photograph+this+photo+was+probably+composed+of%3A%0A%2A+A+regular+light+source%2C+with+a+quarter-wave+plate+installed+to+polarize+the+emerging+light%0A%2A+A+regular+photo+camera%2C+with+a+quarter-wave+plate+installed+in+front+of+the+lens%0A%0ALight+and+camera+being+installed+and+oriented+in+the+same+direction%2C+the+two%0Aquarter-wave+plates+were+turned+with+the+polarizing+axis+in+the+same+direction."></span><span id="field-source" title="United+States+Department+of+Agriculture+%28%5Bhttp%3A%2F%2Fwww.ars.usda.gov%2Fis%2Fgraphics%2Fphotos%2Fk7245-1.htm+link%5D%29%3Cbr%3Ecropped%2C+noise+removed+with+a+Gaussian+blur+in+The+GIMP"></span><span id="field-date" title="unknown"></span><span id="field-author" title="Scott+Bauer"></span><span id="field-permission" title="%7B%7C+cellspacing%3D%228%22+cellpadding%3D%220%22+style%3D%22width%3A100%25%3B+clear%3Aboth%3B+margin%3A0.5em+auto%3B+background-color%3A%23f7f8ff%3B+border%3A2px+solid+%238888aa%3B%22+class%3D%22boilerplate%22+id%3D%22pd%22%0A%7C+%5B%5BImage%3APD-icon.svg%7C64px%7CPublic+domain%5D%5D%0A%7C+%27%27This+image+is+a+work+of+a+%5B%5B%3Aen%3AUnited+States+Department+of+Agriculture%7CUnited+States+Department+of+Agriculture%5D%5D+employee%2C+taken+or+made+during+the+course+of+the+person%27s+official+duties.+As+a+%5B%5B%3Aen%3AWork+of+the+United+States+Government%7Cwork%5D%5D+of+the+%5B%5B%3Aen%3AFederal+Government+of+the+United+States%7CU.S.+federal+government%5D%5D%2C+the+image+is+in+the+%27%27%27%5B%5Bw%3Apublic+domain%7Cpublic+domain%5D%5D%27%27%27.%27%27%0A%7C+%5B%5BImage%3AUSDA+logo.svg%7C80px%5D%5D%0A%7C%7D%5B%5BCategory%3APD+USDA%7CBiodegradablePlasticUtensils2.jpg%5D%5D%0A%0A%7FUNIQ5e8bd1c64392a534-gallery-00000000-QINU%7F"></span><span id="field-otherversions" title=""></span></p>
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<div class="floatleft"><span><a href="http://commons.wikimedia.org/wiki/Image:Video-display.svg" class="image" title="Desktop wallpaper icon"><img alt="Desktop wallpaper icon" src="http://upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Video-display.svg/50px-Video-display.svg.png" width="50" height="50" border="0" /></a></span></div>
</td>
<td>This <a href="http://en.wikipedia.org/wiki/Wikipedia:Featured_pictures" class="extiw" title="en:Wikipedia:Featured_pictures">English Wikipedia featured picture</a> is fairly large and has an <a href="http://en.wikipedia.org/wiki/Aspect_ratio_%28image%29" class="extiw" title="w:Aspect_ratio_(image)">aspect ratio</a> of approximately <b>8:5</b>, <b>16:10</b>, or <b>16:9</b>, making it suitable as a <a href="http://en.wikipedia.org/wiki/widescreen" class="extiw" title="w:widescreen">widescreen</a> <a href="http://en.wikipedia.org/wiki/computer_wallpaper" class="extiw" title="w:computer_wallpaper">computer wallpaper</a>.
<p>See the <a href="http://commons.wikimedia.org/wiki/Category:Commons_featured_widescreen_desktop_backgrounds" title="Category:Commons featured widescreen desktop backgrounds">gallery</a> of such images, or the <a href="http://commons.wikimedia.org/wiki/Category:Commons_featured_desktop_backgrounds" title="Category:Commons featured desktop backgrounds">gallery</a> of non-widescreen images.</p>
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<tr><td>actuel</td><td class='filehistory-selected' style='white-space: nowrap;'><a href="../../../../images/shared/7/7d/BiodegradablePlasticUtensils2.jpg">22 février 2007 à 22:19</a></td><td>2 548×1 757 <span style='white-space: nowrap;'>(420 Kio)</span></td><td>17Drew</td><td> <span class="comment">({{Information |Description=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)</span></td></tr>
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