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## Main Question or Discussion Point

Can anyone supply me with the mathematics behind the energy gain/ loss as a photon travels through a gravitational potential difference?

- Thread starter DeG
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Can anyone supply me with the mathematics behind the energy gain/ loss as a photon travels through a gravitational potential difference?

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Good old WP is probably a good place to go at least for starters - http://en.wikipedia.org/wiki/Gravitational_redshiftCan anyone supply me with the mathematics behind the energy gain/ loss as a photon travels through a gravitational potential difference?

Note the alternate viewpoint in terms of differing clock rates rather than energy gain/loss in the section "Gravitational redshift versus gravitational time dilation"

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