This is in reference to the pulsating sphere question shown here:
It was said that:
"Any change in the rate of increase of radius of the sphere does not lead to a change in the electric field at any point farther from the sphere than the maximum radius the sphere can attain while it is pulsating. So the electric field at all points whose distance from the centre of the sphere is larger that the maximum radius that can be attained by the pulsating sphere is constant over time. So beyond the maximum attainable radius there is no electromagnetic radiation."
by the top answer.
Can someone please explain this more? Also, doesn't Guass's law apply to static objects?
I am confused about these aspects because in Feyman's lectures book 1, equation 28.3 (http://www.feynmanlectures.caltech.edu/I_28.html) states that a moving charge's induced electric field at some point is dependent on its acceleration, and velocity. Can someone please explain how this equation is in effect in the pulsating sphere example?
Thanks in advance