Radiation of completely black body
Translated to Malayalam by <a href="//commons.wikimedia.org/wiki/User:Adithyak1997" title="User:Adithyak1997">User:Adithyak1997</a>
File:Blackbody.svg by <a href="//commons.wikimedia.org/wiki/User:Helix84" title="User:Helix84">User:helix84</a>