The gravity around an object is a result of the pressure on the mass in the center from the mass in the outer portion of the body. The pressure causes the mass in the center to be pushed close together. The closeness of the mass, with enough pressure, causes the displaced space around the individual particles to be displaced a second time through and outside of the body of the object. As light travels through space it takes more energy to travel (push and pull) through a higher compression of space. When light enters a higher gravitational field the space/energy ratio increases, the energy of a photon is smaller in comparison to the value of space than the energy is in a lower gravitational field. The energy shifts to red, a longer wavelength, engendering a smaller stretch over a longer area of space with a smaller compression to carry. Start with two identical photons. Place one in a low gravitational field and the other in a high gravitational field. Observe from outside space and time. Photon A is in a low gravitational field where the value of space is equal to one and photon B is in a high gravitational field where the value of space is equal to three. Both are released at time zero according to each clock that travels with each photon. Photon A and photon B travel through equal amounts of space in equal amounts of time. Photon A travels through three meters of space at the speed of light. Photon B travels through three meters of space that are compressed into one meter in an equal amount of time. Though each photon has traveled through equal space in equal time, photon A has traveled a much larger physical distance and appears to have traveled it in the same amount of time that photon B took to travel one third of that distance. Photon A appears to travel faster than photon B. Viewing it from within space and time, time appears to run faster in a low gravitational field and slower in a high one.
Gravitational Redshift
Blue and green: Earth
Yellow top: photon A
Yellow bottom: photon B
Black: physical distance
Red: clock
Blue: compression
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