Push gravity using a particle model has been shown to be vulnerable to various criticisms not least being unable to explain what particles that do the pushing are made of. But if EMR is used rather than particles I believe push gravity can stand up to scrutiny.
The usual theoretical explanation for push gravity is that gravity as EMR ‘pushes’ in from all sides evenly. This means if two objects are close together each will throw a ‘shadow’ onto the other. The mass of each body reduces the push on the other in its shadow. This of course will result in the two objects apparently having a gravitational attraction to each other. In fact, this is not gravity pulling but rather an external force pushing the two objects together.
Some say that even an EMR push theory wouldn’t work. Saying it would lead to ‘drag’ of orbital bodies in the solar system and that this isn’t observed. Other criticism being: How does the EMR interact or ‘push’ the atom? Or,..wouldn’t the push waves energy build up in each atom and it would become heavier over time? These criticisms *can* still be explained by a push EMR model.
As I have outlined elsewhere in my other pages a push model using EMR would only work in an infinite and non expanding non Big Bang universe. And one where relativity or quantum effects like particles are not invoked.
In a EMR push gravity model any object whether it moves relative to any other mass or not is always at the center of its own infinite universe. Because in an infinite non BB universe any point or object is always technically at the center of the universe by right of there always being an infinite amount of mass equally in any direction outside any object.
This means that once local gravitational forces are ignored there is a push pressure of EMR radiation pushing in *evenly* from all directions. Regardless of that objects location or its movement relative to any other object.
In other words an orbitting body in our solar system will not experience ‘drag’ as long as it moves along its inertial path. And only experience “drag” if a change of direction in its inertial path is needed. Or of course if it experiences the gravitational ‘shadow’ from a nearby mass.
This is essentially inertia. And indeed observations show that any object will continue travelling in a inertial path until force is applied to change its direction. In the same way as an object with equal push force pushing in from all directions of the universe will need to use force to move against this equal pressure in any direction. And once the force has stopped pushing the object from any one direction it will be on a new inertial path where it still sits at its own center of an infinite universe.
Some say push gravity wouldn’t work because to push the object would involve transferring wave energy or particles to the atom. And that this would imply atoms in any push models would grow bigger and heavier. Which obviously isn’t observed. In a particle push model this is a problem. But with a wave EMR model it isn’t. Because the radiation either goes straight through the atom, or for a small percentage of incident radiation, gets reflected back in the same direction as it came. This reflection is the force needed to explain the ‘ push’ of gravity. This is already observed with light pressure via solar sails. EMR radiation is observed to exert a push on the mass of the solar sail. That observed push on solar sails is essentially ...the same mechanism that gives us push gravity.
