1 Conversation

First off, it's important to note that I'm dealing with the *logic* of boundaries between sets of rules. It's *not* necessary to know the content of a single Law of Physics, or for any of our Laws of Physics as currently understood to be correct.

So what happens to anything trying to transit the boundary?

1) There is a rule, or metarule, that governs the transition. But for this to be the case the metarule must apply on both sides of the boundary, and be consistent with both sets. This means that the "local rules" on either side of the boundary are just manifestations of the metarule, and that we are dealing with what physicists call a "phase transition", (the sort of thing that happens when ice melts) and not a genuine rule change at all.

2) There is no rule, and what happens on one side of the boundary has no bearing on what happens on the other side. In which case "nothing" crosses over, and what we have is a place in "our" space where things happen at random. Noether's Theorem - If the Laws of Physics are symmetric through all possible rotations (ie if they are universal) then the existence of the universe must be underpinned by a universal constant (ie energy) - has implications here since it means there can't be such a boundary - a reaon for thinking that the universe is unbounded.

Bookmark on your Personal Space

Conversations About This Entry



Infinite Improbability Drive

Infinite Improbability Drive

Read a random Edited Entry

Written and Edited by


h2g2 is created by h2g2's users, who are members of the public. The views expressed are theirs and unless specifically stated are not those of the Not Panicking Ltd. Unlike Edited Entries, Entries have not been checked by an Editor. If you consider any Entry to be in breach of the site's House Rules, please register a complaint. For any other comments, please visit the Feedback page.

Write an Entry

"The Hitchhiker's Guide to the Galaxy is a wholly remarkable book. It has been compiled and recompiled many times and under many different editorships. It contains contributions from countless numbers of travellers and researchers."

Write an entry
Read more