WW,
I do not see 4D as others do. I see it as 3D plus 1D. and not much more. I do not see anything gained unless one goes all the way to the 6th dimension.
If I chose to follow this particular line of thinking, I wouldn't waste much time on the 4th or 5th. I would jump straight to the 6th.
Generally, I use the KISS method of explanation. Apparently, you don't need that. In my line of thought the 4th dimension is simply an expansion or contraction of our 3D universe. We see no change as we are part of what we think is 'all'. I also have to ask, if there is no emission from a black hole, then why haven't they swallowed the universe and ripped apart all the matter?
I think the black-hole is another arrogance mistake by man. We thought we were the center of the universe, at one time. Now, I think we believe 'OUR' universe is a fixed value or a changing value within our grasp. I don't think a black-hole will radiate anything except at the interface to our universe. That radiation would only be the result of processing bits of our universe while those bits are still in our universe. Once those bits cross into the black-hole they are part of another universe. The greatest amount of radiation will be on the other side. We see interesting varieties of radiation from other heavenly bodies. Why does a black-hole have to follow the same process and results? I think we are in transition. The big bang (white-hole?) may be our entrance into this universe from another. We will exit via another black-hole and have another discussion about this in about 15 billion years. So, my quick and dirty answer: Give it all time
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