I'm just wondering what we know about the speed of gravity.
a) Is the gravitational force determined by mass or a combination of mass and energy?
b) As a planet orbits the sun, can we discern its position by detecting its gravitational force instantly and therefore see it slightly ahead of...
In doug's thought experiment, let's say that the source light is linearly blocked by the high gravitational source (say a dense star). Say also that the gravitational force on the light beam is enough to allow the observer to see the light source due to bending. Wouldn't this produce a ring...
Additional information
I have added the two longer lectures that go into the math and measured effects.
http://creativefamily.net/science/
The basic thought experiment i believe shows in the simplest terms the existence of 90 degree gravitational red shift.
As the light passes an...
Pardon me if i am not grasping something. but!
Tell me if this very short presentation does not give a good argument that red shift occurs between two stationary light sources where gravity is at 90 degrees.
http://creativefamily.net/science/Lecture0601.pps
This lecture is from a...