I've found interesting theories about the time involved in the transitions
of electrons between states.
It seems to vary in a wide range, and involve more than one transition
in complex atoms (with a photon emitted at each transition), but there
is consensus, somehow, that the transition time is aroun 1 nanosecond
and involves several wavelengths of the photon.
It seems that a problem exists when talking about photons: their properties
can't be completely separated from electromagnetic waves.
So, if a photon as a frequency, it implies oscillations.
Where are oscillations, something is vibrating, changing its amplitude with
a period (or a variable period in damped oscillations),
So, my question is: What oscillates in the photon as it travels at "c" speed?
And, as oscillations occur in time axis, in the amplitude axis something changes.
So, what changes in amplitude with the oscillating photon?
This bring closer and closer the idea of a photon as a packet-wave, isn't it?
But the problem with packet-waves is that the simple formula for energy E=hf can't
be applied to it, as its spectral decomposition has a dispersion of components around
the central frequency f.
Then, isn`t it a dead end?
I'd appreciate some comments about these thoughts.