On Sun, May 21, 2006 at 03:00:53PM -0400, David VanHorn wrote:
> Ok, sanity check time.  I've had another one of those disturbing thoughts..

Don't we all.

> Photons travel at the speed of light, and no other speed (in a given
> media).  Correct?

True.

> Time slows for a particle as it approaches C, and at C a particle does not
> observe time passing at all. Correct?

Particle implies mass. Photons are massless. If they were not massless then
they couldn't be moving at the speed of light as it would take infinite
energy to accellerate a particle with mass to the speed of light.

> So how can a "timeless" particle interact with anything?  It would either
> always be interacting, or never be.

Not a problem. Photons have no mass. So they are not really particles in
the true sense of the word.

BAJ
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