Mar 03

SeanCarrollMysteries of Modern Physics: Time; Teaching Company Series, by Dr. Sean Carroll ★★★

I’ve been doing much reading on the issue of time, mostly focused on the aspect of God existing outside of both space and time. The title of this series suggested that physics might provide help in this regard. In reading debates on God and time I noted that the more conservative philosophers came under criticism for not understanding the new modern scientific thinking regarding time. Perhaps I was missing something, so this series seemed to be relevant in my quest for understanding. It wasn’t.

Dr. Carroll was a reasonably good lecturer and was easy to follow. The pace of the lectures was quite slow. Ultimately, the focus on the real issue (the physics of time) was continually side-skirted. In the first portion of the course, Carroll discusses the physics of entropy and its reversible nature. Even though I knew that entropy was time-directional, the extent of this discussion seemed irrelevant to grasping why entropy was uni-directional. Carroll then spent a section talking about the psychology of time, our perception of time. All relevant, but it doesn’t explain time itself. Finally, Carroll delved into the latest big-bang theory of the development of the universe, and other thoughts on contemporary physics. In order to work, the big-bang theory must arbitrarily assign a small entropy to the beginning of the universe. You wonder how many more rabbits were pulled out of the hat to create the big-bang according to modern physics? The ultimate rabbit trick is the multiverse theory, where the universe separates into two different universes with every action. Carroll is correct to identify the multiverse theory as the “ultimate free-lunch”, in that it is unproveable, and offered as a slight of hand in order to defend the physicist’s fundamental philosophy of life rather than trying to describe nature. Indeed, discussions on the latest and greatest in physics suggested that physicists were smoking some fairly strong weed, and reading too many fantasy books. Einstein’s theories were of no help either, because though one could slow down time in your personal perspective, you always returned to time-on-earth as it otherwise would have been. Einstein doesn’t explain speeding up time by slowing down… how could one slow down not relative to any other point in the universe? Such “slowing down” motion would always be perceived from the observer at point zero as accelerating, yes?

This lecture series was a bit too long for what Dr. Carroll attempted to do, which was to explain time. Although he gave a lovely discourse on physics, time remained the same. Time remains unexplained and unexplainable, and we are caught (created) inescapably in time, to know nothing other than a universe (or heaven) that has a history and the clock ever clicking. For us, there will never be a physics where time is not a part of the equation.

 

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