1.2.1 The effect of the Moon 

This paragraph tries to explain what would happen to the energy of the same photons when the Moon or another large mass comes out at a certain distance. As shown in Figure 1.2, the total acceleration constant g would decrease due to the opposite attraction of the other mass, hence, as indicated by the rightmost expression in 1.0, also the frequency variation Df must decrease. Referring to Figure 1.1, if the Moon is placed at point A, the frequency at that point is expected to increase for the grater pull of the Moon than the Earth, whilst the frequency at point B on Earth is expected to decrease, because the Moon would weakly interfere with the signal in the opposite direction. The final signal would appear as slightly shifted toward point A.


 

Figure 1.2 - Effect of the Moon on gravitational redshift on Earth

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