Re: length of wavetrain of single photon

"Brian A. Koss" <bkoss@xxxxxxxxxxxxxxxxxx> wrote in message
news:08F470D6D06C8D478F34CEF477845177010C4F32@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| Hi,
| There is a posting about this topic:
| Length of wavetrain of a single phot
| <http://www.lns.cornell.edu/spr/1999-03/msg0015180.html> =20
|
| "How do I calculate the number of photons in a given wavepacket coming
| out of a pulsed laser?"
| ..say I know the pulse power and width.
| Thanks,

I have come up with a semi-classical heuristic that should give you a
ballpark figure on the number of photons. The "static" electric field
is,

<E_o> = 2pi*sqrt(hbar*c*n)/lambda^2 in gaussian cgs units.

Where n is the number of photons and lambda is the wavelength of the EM
radiation.

FrediFizzx

.

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