I forgot to mention something that can happen and was written up in a Scientific American
about a year or so ago (Jan or Feb issue of 2003 or 2004). The article was called "Frozen
Time". What the discussion is that photons can be in essence "frozen" to an effective
temperature of 0 K. This is another anomaly of QM and how photons interact with other
particles. Check it out. Maybe this is what you question is Really alluding to. Best wishes.
Maddog
