Why is it you look into a mirror and it appears you can reach into another dimension, you can't?
348613
wow, what a cool way of thinking!  I have wondered sometimes that when I walk up to a mirror and then walk away, where does my mirrior image go?  Does it go do something else until I summon it to the mirror again?
1009023
The universe that we live in has only three spatial dimensions. We are limited to length, width, and height, and we can only travel along three perpendicular paths. This page attempts to explain the properties of a hypothetical universe with a spatial fourth dimension. While people generally call time the 4th dimension in the universe we live in, time will be the 5th dimension in my hypothetical universe. \n\nMany fascinating possibilities exist when a spatial fourth dimension is present. Several types of wheels are possible, very complex machines can be built, and many more shapes are possible. Objects can pass by each other more easily, but they are harder to break into multiple pieces. Energy reduces much faster with distance than in the 3rd dimension, so both light and sound are weaker. Much more things can be compacted into a small space, but its much easier to get lost. In this page, I will explore these and many other interesting properties of the fourth dimension.
585241
the sensors we have in our body are only able to detect the 3 dimensions that we see. some physicists think that there are up to...11? dimensions existing, however we are unable to detect them and therefore...its not possible to "go" there. the same as we are not able to "go" into a 2D world...unless someone has figured out a way to become flat
594695
The universe cannot have an end, it has to be infinite and completely symetrical. This leads to three possible scenarios for its shape a saddle shape, a spheroid, and a flat plane. Different experiments have led scientists to believe that space is an infintie flat plane. The main reason why we know that if there were edges to space then we would have to me moving towards some objects and away from others. This is not the case as all observed entities are moving away from us. This leads to the assumption of a infinite expanding universe. \n\nAs far as our perception is concerned we are not inside of anything since the universe occupies all of the space that we can observe so the universe is everything. But if somehow you could step out of our universe into a higher dimension you dont know what you would see. There are some theorists who believe our universe is one of many universe. But since there is no way to see out of the universe we may never be able to answer this question. I agree that if you start thinking in this manner it can get quite perplexing\n\nTo the person who said space must have an edge to expand think of a baloon. If we go down a dimension imagine that our galaxy is a penny glued on the surface of a baloon. To us the baloon has no edges at all since we cannot see out into the third dimension, yet the baloon is expanding. So from our vantage point we live on an infinite surface that is expanding and causing nearby pennies to all travel away from us.
621884
I do this all the time in the mirror. Metaphorically of course. I'm not a human X-ray! But if I stare at myself long enough, I can see myself differently, like as other people see me, and I can "see" my soul. It's kinda freaky and I don't do it as much as I used to.
287924
That's because light reflects in the mirror just as if it's coming from the same distance the real object is but behind the mirror.  You are nor looking an image that is at the mirror distance, but really at the real object distance.
1099754
This is not easier said than this.\n\nGod like a human had a mother and father in another dimension. If youo humans were created in its image then why do you not know this.
207353
When you see an object, you see the light bouncing off of that object.  When you see an object in a mirror you see the same light it just makes one more bounce off of the mirror before it reaches your eyes.\n\nMirrors are unique in that they bounce all visible light the same and in a regular way.  This allows you to recognize the objects that are reflected in them as if you were seeing them directly.
637166
Our existence is defined by 3 spatial dimensions: up-down, left-right, and forward-backward.  Our bodies and senses are only able to conceive these three dimensions.  A fourth dimension really doesn't make sense, because there is absolutely no way we can point in a fourth direction at right angles to these three.\n\n But mathematically, there's no reason why a fourth, fifth, or more dimensions can't exist.  It's quite possible, mathematically, for other dimensions to exist - and it's very probable that, if they did exist, we could never experience them.  NEVER.  That's a bummer, but that's the way it is. \n\n A simple mathmatical 4th dimension mathmatical concept is the tesseract.  Think about these relationships and you may understand what a tesseract is: Line - Square - Cube - Tesseract.  It's a 4-D equivalent to a square (2-D) or cube (3-D).  Google "Tesseract" for more info.\n\n About a hundred years ago a guy named Ed Abbott was asking the same question you've asked.  In order to help him think about what more dimensions are like, why we can't experience them, and what might happen if we could, he wrote a book called "Flatland."  Flatland is a 2-dimensional world, inhabited by shapes like squares and triangles.  They can't comprehend a 3-D world (just like we can't comprehend 4-D)  But interesting things happen when some of those shapes do venture into a third dimension. \n\n Actually I was wrong when I said that humans can't comprehend 4 or more dimensions.  Additional dimensions come in pretty handy in physics.  The most common example of this is time, which lots of scientists treat as a 4th dimension.  But it's a 4th dimension in which we can only move one direction - forward.  By looking at time as a 4th dimension, it's a lot easier to understand most of the principles Einstein came up with in his theory of relativity.  \n\n Another area of science where multiple dimensions are handy is a theory of what everything (atoms, electrons, protons, etc. - the basic building blocks) are made of, called string theory.  It's really complicated, but basically if you think of every basic partical as a string vibrating in 10-dimensional space, then all of relativity and quantum theory works out pretty well.\n \n Finally - to answer your question - do I believe in different dimensions?  Yes.  I think a lot of what we as humans see as spiritual - everything from angels to heaven to how God can do what He does - is a lot more easier to explain if there's a spiritual realm close to us, but separated in a 4th dimension. But that's just my thoughts - it makes sense to me, but I'd have a hard time proving it to anyone.\n\n Great question!  Hopefully these answers help you comprehend it.  And if you're the first person to venture into the fourth dimension, then please come back, look me up, and take me with you!
351827
According to string theory, the extra dimensions would be infinitesimally small, so we could not travel into them.  However, there are other theories (i.e. Heim Theory) that have dimensions that we could travel through.
445419
It's a parapsychological phenomenon. It means that someone can use the power of their own mind to see things, objects, places, etc. that are remote in distance and time. That is, they can see inside closed rooms, even in another country. It's almost as if they are in spirit form, and walk in spirit form, and can see through different eyes.
908691
Quantum Physics suggests that our minds control our environment.  Theoretically if an individual could harness the inherent power of their mind then transcending the next dimension should be relatively simple.  \n\nSkipping ahead would mean slipping into an alternative timeline (5th dimension I believe), which would not necessarily be the same future we will experience, but a parallel existence where things may not be the same as they are today.  For instance in that timeline maybe the Nazi's won or Rome remained and that world would be shaped in that image.  \n\nGoing backwards would be much simpler than shooting forward.  As you are only transcending 1 dimension not 2.
126328
Technically, we live in a 4 dimensional world.  The forth demension is time.  There are no actual 3, 2 and 1 dimensional worlds that you can get to, but you can see a simulated 2 dimensional world.  it's the computer screen in front of you, or a tv screen, which shows only length and width, although it can show the illusion of depth.
792242
They are almost the same size, you are right  - the reflective image is smaller. The reason it looks bigger is because you are looking at a more or less 2-dimensional image. You have to physically look from the top to the bottom. I don't know if this is a good example, but think of a hockey goalie protecting his goal. The further out he moves, the more of the goal he covers. He looks like a giant to the shooter because he has to move his head to see from his head to his feet. \nHere's one for you - how large vertically does a mirror have to be in order to see your total reflection? It doesn't matter how far away it is?
1118162
If we imagine this all happening on in 1 dimension, a line, (i.e. no up/down or side to side movement possible), then the only way something can travel is toward or away from the observer.\nEven if this is not the exact case as in your example, this effect is easily done by merely turning one's head in order to align one's reference frame to the direction of the car's motion and thus would have the same effect.\n\nIn this case, our observer sitting at some location on the line and in his reference frame, everything else is moving either toward him or away from around him.\nIn his reference frame, he sees a car heading Straight towards him at relativistic speeds in the opposite direction he is facing.\n\nA length contraction occurs only in the direction of motion as observed by the observer.  In other words, if the car is moving toward/away from the observer, the car's length shortens, not its width or height.\nThe length contraction is in the same direction as the relativistic motion.  Since we defined this to be a single dimensional system with only one direction of travel possible, the approaching car would not get thinner or shorter (less tall), but rather, its length would contract.\n\nThe effects of the car appearing wider and taller as it got closer and closer would still apply as normal since the car is not traveling in either of those directions.\n\n\nIn your own frame of reference, taking a measurement and finding that the car has experienced a length contracting still makes that measurement every bit as real and valid as a measurement taken from the other car's frame of reference (v = 0) where there is no length contraction.
376227
That's just a characteristic of concave mirrors.  Check this site out.  It shows you how it happens.\n\nhttp://www.physicsclassroom.com/Class/refln/U13L3a.html
1094356
It means that we can measure the size of the universe, but if you tried to approach an "edge" of the universe, all you would do would be to extend it. Wherever you go, the universe goes with you, so it is unbounded. You cannot go "outside" the universe.