Re: Is light a wave or a particle?
From: Bjoern Feuerbacher (feuerbac_at_thphys.uni-heidelberg.de)
Date: 09/17/04
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Date: Fri, 17 Sep 2004 11:01:02 +0200
Jim Greenfield wrote:
> Bjoern Feuerbacher <feuerbac@thphys.uni-heidelberg.de> wrote in message news:<cibsc9$b6i$1@news.urz.uni-heidelberg.de>...
>
>>Jim Greenfield wrote:
[snip]
>>>I am referring to kinetic energy;
>>
>>Kinetic energy is a scalar, not a vector, no matter if photons are
>>massless or not.
>>
>>
>>
>>>the mass of the photons
>>
>>Mass is a scalar.
>>
>>
>>
>>>and their speeds.
>>
>>Speed is a scalar - it is the magnitude of the velocity vector.
As Timo Nieminen already pointed out: Words have precisely defined
meanings in science. If you want to be understood, use the proper
words with their proper meanings.
>>>(linear plus angular rotation)
>
>
> momentum, energy, whatever- see previous reply
>
>>Huh? Rotation of photons?
>
>
> It would explain a lot.
For example?
> Picture a bar magnet spinning as it travels a linear path. What would
> a row of metal filings along the track (nearby) do???????
Quite difficult question, since there are magnetic and eletric fields
involved, and it is not quite clear how fast the filings can react to
changes in the fields.
> How would the wave look? How would it vary according to the angular and linear rate of the
> magnet?
Which wave? The electromagnetic wave created by the movement of the magnet?
Bye,
Bjoern
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