A figure of <a href="https://en.wikipedia.org/wiki/Transparency_(optics)" class="extiw" title="w:Transparency (optics)">transparent</a> <a href="https://en.wikipedia.org/wiki/Circle" class="extiw" title="w:Circle">circle</a> <a href="https://en.wikipedia.org/wiki/Inscribed_figure" class="extiw" title="w:Inscribed figure">inscribed</a> in a white <a href="https://en.wikipedia.org/wiki/Square_(geometry)" class="extiw" title="w:Square (geometry)">square</a>.
<a href="//commons.wikimedia.org/wiki/User:Amit6" title="User:Amit6">Amit6</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Amit6" title="User talk:Amit6">talk</a>)
2009-04-03
<b><a href="https://en.wikipedia.org/wiki/Myrecovery" class="extiw" title="w:Myrecovery">Own work by uploader</a></b>