Benno ter Kuile writes:
Ever heard of a light meter ?. Those calibrated in (micro) einsteins give
you the numebr of photons. Besides not being able to measure the energy does
not make a reaction exothermic.
Funnily enough, I have heard of a light meter. But I'm not quite sure
of the relevance of your argument.
Photosynthesis might be described as follows:
hv
6CO + 6H 0 ------> C H O + 6O
2 2 6 12 6 2
We now need to now how many photons at (v) are required for this ---
how do you do *that* with a light meter? As for the idea that ``not
being able to measure the energy makes a reaction endothermic'' ---
who said that? I'm sure it wasn't me. And I'm still not sure whether
photons count as thermal energy or not.
... John Woods
