Hi,
Am Dienstag 16 Februar 2010 schrieb Sarah Moller:
> I have never done this experiment myself so can't vouch for its success,
> and people may already have tried and dismissed it but I thought i'd post
> it in case it was useful.
Thanks, Sarah, for pointing to that experiment.
I tried to send a photo of the experiment in action at a science fair, but
this list doesn't allow attachments (even though it's only 50kb). So you won't
get to see the image :-(
As far as I know, it basically works quite well, but depending on the
environment you have to simplify it by using CO2 gas rather than the chemical
reaction, and also put a lid on. A glass lid is problematic because glass
absorbs infrared, so that's a confounding factor. Also LED lamps work best
because they produce relatively pure visible light. For this display they
tried several different containers and lamps, which shows you that nothing in
science is quite as easy at it seems at first.
It won't stop skeptics though. I've seen plenty of arguments from skeptics
that experiments like this don't have anything to do with the "alleged" global
warming. In the end there is never a simple experiment in science that is
unambiguous. And I believe it gives a wrong impression of science to claim
otherwise.
Hope this helps
Cheers
Stephan
--
Stephan Matthiesen
http://www.stephan-matthiesen.de
Neu auf www.science-texts.de: Muster des Monats 2/2010
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