Year: 2002 Pages: 3
The calculation of the gravitational shift of photon frequency forms the foundation for the quantum theory of gravity. The 4-vector nature of the gravitational field (its time component is Newton's potential) is its consequence. As a result, the previous difficulty of gravitational field quantization in general relativity (connected with metric quantization) is removed. That opens up the way to the construction of a united theory for all of the fundamental interactions.