On 26 Nov 2004 15:26:09 -0800, jim rozen
wrote:

In article , Ted Edwards says...

jtaylor wrote:

I doubt all of the 4W goes into heat.

To all practical purposes, it does. Even the most efficient light
sources are struggling to get up to 10%. The rest is heat.

And even that ten percent goes into heat, eventually.

By the end of the day, all those photons has smacked into
somthing and warmed it up.

Jim
Speaking of photons, does all matter emit photons until it's
completely still and cold? E G lets say you heat up some hydrogen
molecules and spit them out a gun into the vacuum of space. Will they
retain all their heat, or at least some level of heat, as long as they
don't collide with something else? Or do atoms keep emitting longer
and longer wave lengths until they reach some level, microwave or
something, where that last photon removed the last bit of energy and
the atom is now at absolute zero.
ERS