sue jahn wrote:
"Ben Rudiak-Gould" wrote in message ...
For roughly the same reason, a
photon emitted at the center of the earth (imagining the earth to be
transparent) will lose energy as it rises, which means that it will redshift

http://scitation.aip.org/getabs/serv...cvips&gifs=yes

You're right. It was a terrible explanation. I retract it.

What's true is that (in the linearized theory) there's a relationship
between gravitational potential and time dilation, and the "surface with
pits" is actually a plot of the gravitational potential (as opposed to a
spacetime embedding), so lower is slower.

-- Ben