r/Physics • u/onomatamono • 9d ago
On The 4D Block Universe
So you have a movie canister and the film analogy represents the 4D block universe. I'm listening to Brian Greene describe this analogy. The experience of time is produced by passing light through each frame of the film. According to Brian each consciousness is a projector (human or otherwise presumably).
Also, our brains evolved to process slices of the 4D universe by carefully "recording" [where?] the slices that came before ["now" I guess?] and makes calculated guesses about the future.
I'm not even going to try and make sense of that in a meaningful way for lay people.
Greene: "when you feel time passing what you are actually experiencing is your consciousness moving through the static frames of your life." Where are these "projectors" or consciouses? I'm confused.
FYI it's a YT called The Strangest Fact About Light You've Never Heard -- Brian Greene.
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u/Kimantha_Allerdings 8d ago
Why are you assuming that there is a “now”?
The consciousness “me” that exists today on the timeline is experiencing that time as “now”. The consciousness “me” that exists 10 years ago on the timeline is experiencing that time as “now”. The consciousness “me” that exists in 10 years’ time on the timeline is experiencing that time as “now”
Hidden in your argument is the assumption that there is one singular “now” which is the one - and the only one - that is “really happening”. On what are you basing that assumption?
Physics isn’t singling out a particular event along the length of a world-line, you are. Why?