A photograph of a Spectralon panel. Spectralon is a material with a high diffuse reflectance (&gt;99 %) over a wide spectral range, giving it a white appearance.
<a href="//commons.wikimedia.org/w/index.php?title=User:Itrobinson&amp;action=edit&amp;redlink=1" class="new" title="User:Itrobinson (page does not exist)">Iain Robinson</a>
2012-01-26
<span class="int-own-work" lang="en">Own work</span>