Note: There have been quiet a few of these but I would like to add my thoughts. I do not intend to copy any ideas (I might not) but sorry in advance if I do. Beware for some hard core nerdiness.
Okay, so in the main opening theme song it says how his molecules were rearranged and all that jazz. I just finished my nuclear chemistry unit in my science class and have really been thinking.
Extra dimensional elements were fused into Dannyās DNA, which should theoretically form new elements or at least new compounds within his body. My teacher says once nuclear fusion is possible, we will practically have an infinite power source, but weāre not quite there yet. (The Fentons use ectoplasm as an energy source with that one device I canāt name right now). Itās near impossible at the moment because the intense heat and pressure required for nuclear fusion is unsafe to be around. Weād pretty much have to recreate the sun on earth to achieve the specific conditions.
But ectoplasm is from a different dimension, and therefore has different properties. When concentrated ectoplasm bombarded Dannyās system in the portal (chances are the electricity killed him but also jumpstarted his heart, bringing him through the dimension of postmortem and almost making him into a ghost) it fused to certain molecules in his body and completely changed his biological makeup.
Thereās also the whole āextra dimensionalā thing. I believe that the ghost dimension is like cling wrap on the human dimension. On the same exact spot, yet somehow parallel; they never intersect aside from portals. When someone dies, they ācross overā in between the two in a sense that they have their corpse, and their soul. Ghosts look like their souls or resemble how they died or a personality trait. I think the Ghost Zone is like the Astral Plane. When Danny was made half ghost, he was pretty much fused with both dimensions, almost like the closure on the two parts of a zip-tight bag. His fusion allowed for another hole to be opened up (more so closed up as there is no gap between the dimensions at the portals) through almost a chain reaction (I know chain reactions are with nuclear fission, but it is still relevant).
But whenever Danny goes ghost, he becomes part of the Astral plane, though is still visible in the human dimension and not the ghost one. I think beings must pass through portals until they can be viewed by the other dimension. But whenever a ghost goes intangible, it slips itās physical mass into another dimension. Thatās probably why humans can phase through things in the Ghost Zone.
Iām not too sure how it all pawns out, and Iāll bet if I take some extra dimensional physics and crazy advanced math courses I could probably give a thorough explanation, but this is what I know about extra dimensions. Sorry if it was hard to follow, but you can impress your friends with this hard core science.