- #1
omoplata
- 327
- 2
Hi,
I just saw this video on youtube, originally from Carl Sagan's 'Cosmos', about a 4th spatial dimension.
http://www.youtube.com/watch?v=Y9KT4M7kiSw&NR=1"
So what happens when the photons that are traveling in 3D hit an object in a 2D plane universe. To a 2D object it seems like photon appearing from nowhere? And therefore matter and energy appearing from nowhere?
Not only for light, but if any piece of matter went through the 2D plane universe wouldn't that imply that the conservation of energy doesn't hold in the 2D universe?
And what about the conservation of momentum. If a 3D object hit a 2D object with any velocity perpendicular to the plane, then that would push the 2D object out of the plane and thus out of its universe (provided they interact).
I would like input from you guys as to whether my reasoning is correct. And is there any way of making objects in a 2D plane universe and a 3D universe interact while holding the conservation of energy and momentum in both universes?
I just realized while I was writing this that we don't actually see any really 2D things. I mean, everything we see have a thickness, even if one atomic layer thick. So even if there was a 2D universe within our 3D universe, we wouldn't see it because it has no thickness?
I just saw this video on youtube, originally from Carl Sagan's 'Cosmos', about a 4th spatial dimension.
http://www.youtube.com/watch?v=Y9KT4M7kiSw&NR=1"
So what happens when the photons that are traveling in 3D hit an object in a 2D plane universe. To a 2D object it seems like photon appearing from nowhere? And therefore matter and energy appearing from nowhere?
Not only for light, but if any piece of matter went through the 2D plane universe wouldn't that imply that the conservation of energy doesn't hold in the 2D universe?
And what about the conservation of momentum. If a 3D object hit a 2D object with any velocity perpendicular to the plane, then that would push the 2D object out of the plane and thus out of its universe (provided they interact).
I would like input from you guys as to whether my reasoning is correct. And is there any way of making objects in a 2D plane universe and a 3D universe interact while holding the conservation of energy and momentum in both universes?
I just realized while I was writing this that we don't actually see any really 2D things. I mean, everything we see have a thickness, even if one atomic layer thick. So even if there was a 2D universe within our 3D universe, we wouldn't see it because it has no thickness?
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