Do you believe that we move to another dimension after death, rather that we exist at another frequency allowing ourselves to be free of the physics that currently control us on earth. Only light, or other waves that have no intrinsic mass(spirit), can move at the speed of light allowing an entity the freedom to travel between dimensions.
Tami
Your questions arise out of an interest in the subjective human experience. The nature of the interaction of people with one another and the universe at large is enormously more complicated than the interaction of bits of matter or electric charge with one another. In the face of this hopeless complication, people invent concepts like different realities, spirit, the soul and so on. In an attempt to make these concepts more manageable some people cloak them in the terms of science, invoking vibration, unseen dimensions, etc. In my experience these attempts to make a science out of human existence do not work very well. In fact they often lead to laughable inconsistencies.
I do in fact believe in continued consciousness after the death of the body but I do so as a matter of faith, not because I have placed scientific labels on the concept. In fact, as a person who understands more about the physical universe than most, I take great comfort in the idea that there are some things that we can know without understanding them. Gaining understanding takes considerable effort. If I were limited to believing only what I understand, my life would be terribly limited and I would be exhausted from the struggle to expand my horizons.
Certainly no one can disprove the notion that there is some sort of unobservable vibration going on in people, or that heaven is in fact another dimension, but in my opinion any attempt to apply the simple laws of physics to the messy existence of human beings in this life or the next is unlikely to lead to any useful predictions about the future.