Re: a question from an AP Chem student...

["Donald E. Simanek" <dsimanek@eagle.lhup.edu>]

On Tue, 6 Oct 1998, kathy venable wrote:

> absorbtion somehow prevented?  The actual wording of the question was "How
> does the electron "know"  whether a photon has the "right" amount of energy?"

Or, an equally relevant question, how does the photon "know" that the
electron has another energy level unoccupied to "jump" to of the right
energy difference to match that of the photon. I'm looking forward to the
answers on this one, to see if any are correct, and helpful, at elementary
levels.

	-- Donald