Re: length of wavetrain of single photon
- From: mat <comstock@xxxxxxxxxxx>
- Date: Tue, 31 May 2005 06:38:04 +0000 (UTC)
Ray Tomes wrote:
> Uncle Al wrote:
>
>>If you know the contained energy (e.g., calorimetry) and the (weighted
>>distribution of) frequency then you know the number of photons.
>
>
> There is no distribution of frequency in a laser to weight.
> There is a single frequency which is what makes it a laser.
>
> Ray Tomes
>
Hardly, Ray. Being single frequency has nothing to do with whether
something is a laser or not. A 10fs laser pulse has roughly 100nm
bandwidth (around 800nm). You can't treat that as a single frequency.
The OP said _Pulsed_ laser. "Single frequency pulsed laser" is an oximoron.
-mat
.
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