Question:
I am fielding this question for a seventh grade teacher in my school
and will copy it verbatim from her note: "Is the movement of electrons from one
energy level to another predictable in terms of how they move and in what
direction and how much radiation is produced?" If anyone in Kidsphereland can an swer the question or
point us in the right direction to find the answer we will much appreciate it.

Replies:
Well, it is predictable in a "statistical" sense - if we
have a large sample of systems with electrons in exactly the
same state, then we know pretty well what fraction of them
will move from one energy level to another and give off
radiation. But we do not know specifically which ones will
do it. And some behavior is very predictable - if we shine
light of the right frequency, it becomes much more probable that
the electrons will move together - lasers work because of this kind of
principle. So, some of the behavior is very predictable, and some
is not.

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