Does heat independently cause Infrared radiation?

[Moviemann345]

If I rubbed my hands together in a dark room (no outside light source), could the heat i produce cause Infrared radiation?

Or is the infrared radiation from our bodies dependent on outside radiation?

 

[NobodySpecial]

Infrared radiation is produced directly from the temperature of a body (at least for a blackbody - but that's not important for now).
Your hands would give off IR when you rub them together - although really their temperature doesn't change much - they feel hot because of the extra blood flow.

If you rubbed two blocks of wood together in the dark they would get warm, eventually (if you did well in boy scouts) they would even glow red in the visible.

 

[Moviemann345]

Yeah i guess humans give off body heat regardless. Thanks