Physicist Rejects that Time is an Illusion

From Is the Future Already Written?:

Ellis’ calculations show that the evolving block universe does not contradict relativity’s prediction that two people can disagree on the order of two events. In both Einstein’s and Ellis’ pictures, the time at which each person perceives both events to have occurred is based on the discrepancies between how long it takes light from each event to reach them. In Einstein’s view, these events — and all future events — coexist. But in Ellis’ picture, both events must lie in the portion of the evolving block that houses the past; they are fixed into reality before information about them reaches anyone. Similarly, in Ellis’ view, two observers can disagree on the duration of an event, but only if that event has already crystallized into the past. Thus, Ellis’ model of time retains enough of the block universe to match with relativity’s predictions, but without needing to take Einstein’s drastic last step of assuming that the fourth dimension is solidified into the infinite future.

Leave a Reply