the term analog

[willie_901]

...

Energy levels aren't discreet, they are just regions with more probability to find an electron compared to other regions. Light capture is very much quantum mechanics defined. It is one of the first areas where it was well observed.

Nothing in nature is more discrete than eigen states or quntitized energy levels. Probabilities are not involved until the properties of the quantized entity is described by operators.

Just look at the spectrum of the H atom for an empirical example.

http://hyperphysics.phy-astr.gsu.edu/hbase/hyde.html#c4

Scroll about 2/3 of the way down.