What is Alternate universe: Definition and 12 Discussions

Parallel universe, also known as a parallel dimension, alternate universe, or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one's own. The sum of all potential parallel universes that constitute reality is often called a "multiverse".
While the three terms are generally synonymous and can be used interchangeably in most cases, there is sometimes an additional connotation implied with the term "alternate universe/reality" that implies that the reality is a variant of our own, with some overlap with the similarly-named alternate history. The term "parallel universe" is more general, without implying a relationship, or lack of relationship, with our own universe. A universe where the very laws of nature are different – for example, one in which there are no Laws of Motion – would in general count as a parallel universe but not an alternative reality and a concept between both fantasy world and Earth.

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  1. S

    What aspects of quantum theory are you curious about?

    As per my name, I am Quantum Newbie. I am I am exactly that. I'm interested more specifically in the following: mandella effect, butterfly effect, alternate universes, mirror worlds, bubble worlds, quantum mortality, crossovers, multiple paths on the same frequency, dementions, universe A and...
  2. V

    Calculating the distance between fringes in an alternate universe

    It's straightforward to calculate the wavelength of the balls which is 20,000m. I said that because this is the case and then the pattern must not be a an interference pattern as with electrons. The second question relies on the formula d = n(lambda)/2. Setting n = 1 for two golf balls will...
  3. S

    Butterfly Effect: How much can you do before change occurs?

    I didn't know where to put this, but sci-fi seemed fitting: Just a hypothetical regarding the Butterfly Effect that's been puzzling me, if anyone has any insight... How much could you do in the past before your very presence started affecting history? For fun, let’s say you wake up 12 years...
  4. Rickswan

    Realistic demon physiology and weapons against them

    This thread is also my introduction to the forum, so hello. So the basic setup of my story is the hordes of hell invade New York City. I'm agnostic, so it's more "beings from another dimension enter ours" than a religious thing - it's like the DOOM game series. Let's say that a certain amount...
  5. RaulTheUCSCSlug

    Ideal Gas Law in "alternate" universe

    Homework Statement Assume that in an alternate universe, the laws of physics are very different from ours and that "ideal" gases behave as follows: (i) At constant temperature, pressure is inversely proportional to the square of the volume. (ii) At constant pressure, the volume varies directly...
  6. H

    Find the period of the space shuttle in alternate universe

    Find the period T of the space shuttle Homework Statement (See image of problem statement for nice layout; the questions are stated below) A space shuttle of mass m is in a circular orbit of radius r around a planet of mass M in an alternate universe. In this alternate universe the laws...
  7. I

    Stargazing Eclipse, reflected light, Alternate Universe?

    Personal account It was 2004. I was looking up stuff on the computer. Where my computer sits I have a relatively clear view of the hallway. Out of the corner of my eye, a figure passes by my hallway. No one was home and this could not have been a substantial human being. The figure had...
  8. C

    Alternate universe attractive/repeling force?

    Before I post the question, I must state for the record that I am a grunt so please be gentle with me. My question is this, Could altenate universes generate an attractive force on our own to speed our own expansion? Or a repeling force to aid contraction? Possibly other universes may have...
  9. C

    About Deja Vu: Mass and travelling into an alternate universe.

    Hi all, not sure if any of you all have watched it. Denzel washington acted in it. http://www.imdb.com/title/tt0453467/" I have a question regarding what they said, they need to keep the mass low if they want to transfer an object into the alternate universe, which in the movie it's called...
  10. S

    E&M question: suppose the speed of light is greater in an alternate universe?

    This is not a question of 'how' to do a problem; I know the answer to it and would like an explanation of why this is the correct answer, if possible! Thanks in advance! Suppose there exists another universe where the laws of electrostatics and special relativity and the relevant physical...
  11. I

    Is there a Multiverse of Alternate Universes?

    I believe that a world is created every secondWhatever the unit of measurement for time is... A new world per (insert measurement here) would mean that there were worlds that are still going through the revolution, some that are going through the renaissance, and even some that are going...
  12. G

    What is the alternate universe theory regarding infinite extent and black holes?

    I'm going to try to present an alternate universe theory in this post. If I miss an important detail, please point it out. :) Ok, First part is that the universe is infinite in extent, there is no boundary. What we see as remnants of the big bang is merely the past horizon. Black...