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## Main Question or Discussion Point

On the following website;

http://www.cfa.harvard.edu/Walsworth/Activities/Atomic clock/old_atomicclock.html"

I read that;

The gravitational red-shift is a consequence of the local position invariance of the Einstein Equivalence Principle.

I know what gravitational red shift is and I understand the principle of Local Position Invariance but I don’t understand why gravitational red shift is a consequence of Local Position Invariance.

Can somebody enlighten me on this issue?

http://www.cfa.harvard.edu/Walsworth/Activities/Atomic clock/old_atomicclock.html"

I read that;

The gravitational red-shift is a consequence of the local position invariance of the Einstein Equivalence Principle.

I know what gravitational red shift is and I understand the principle of Local Position Invariance but I don’t understand why gravitational red shift is a consequence of Local Position Invariance.

Can somebody enlighten me on this issue?

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