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Originally Posted by CraigS
G'Day Rob;
Long time .. no hear .. good to see you back in these parts ! 
I was having recall about our previous discussions about the similarity of this and BH Event Horizons. I think I recall leaving that discussion with the QM/String Theory view that 'frozen' images break into ever increasing smaller components (vibrating strings) covering the entire EH. At the moment though, I'm trying to get the Relativity perspective embedded in my brain. The relativists seem to always refer to the 'blinking out' phenomenon and I think this is derived from the formal definitions posted by Steven. (I'll have to have more of a think about the ramifications of these). |
This is a consequence from the Robertson-Walker metric (
http://en.wikipedia.org/wiki/Friedma...3Walker_metric). The event horizon incidentally for a BH is based on a gravitational redshift mechanism, not a cosmological redshift or time dilation mechanism.
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There's another issue also .. raised by Rolf … the redshift one. In theory, redshift would cause the wavelength to become just about infinite wouldn't it ?
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Cosmologists prefer to define the frequency of light rather than it's wavelength for a very good reason. Frequency has the units of reciprocal time. Cosmological redshift is a result of time dilation as derived from the R-W metric, rather than the wavelength stretching. The stretching of the wavelength implies loss of energy which leads to the tired light hypothesis.
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What happens to the energy of the photon if/where this happens ?
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Nothing at all happens. The tired light hypothesis is elegantly refuted by our friend Ned Wright.
http://www.astro.ucla.edu/~wright/tiredlit.htm
Regards
Steven