Black body curves of Planck for various temperatures and comparison with classical theory of Rayleigh-Jeans.
<a href="//commons.wikimedia.org/wiki/User:Paperoastro" title="User:Paperoastro">Paperoastro</a>
<ul><li><a href="//commons.wikimedia.org/wiki/File:Black_body.svg" title="File:Black body.svg">Black_body.svg</a>: <a href="//commons.wikimedia.org/wiki/User:Darth_Kule" title="User:Darth Kule">Darth Kule</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Paperoastro" title="User:Paperoastro">Paperoastro</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Paperoastro" title="User talk:Paperoastro"><span class="signature-talk">talk</span></a>)</li></ul>