Please correct me here if I am wrong:

How the EM case differs from the QM case is in the occupation of these 
modes. Since we are talking photons which are bosons, the occupation 
statistics for each mode will work differently - there can be any number 
of photons occupying a mode whereas in QM there can only be one electron 
occupying any mode (or 2 in "degenerate" approximations where we ignore 
spin).

If there can be any number of photons occupying a mode, how is the DOS 
information helpful? In cases where the DOS is zero, say in photonic 
crystals, we have an interpretation that no modes can exist.

Also, I just looked up the ED book by Jackson and he makes no mention of 
DOS. Is there any reference which introduces this concept and discusses 
how it is useful?

Thanks
Manoj



Robert Rehammar wrote:
> Means the same here. The number of modes available.
> 
> Regards,
> \\Robert Rehammar
> 
> On Thu, 2008-01-17 at 10:02 -0500, Manoj Rajagopalan wrote:
>> Hi all,
>>
>>    Could someone clarify the meaning of this term? I'm aware of what it 
>> means in quantum mechanics.
>>
>>     Any useful links/resources?
>>
>> thanks
>> Manoj
>>
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