Is there a fourth demention??

Question

I just watched a show that has to do w/ fourth dementions.

Answer 1

could be as per this copy righted web page ...

One of the most helpful things to understanding the fourth dimension is to visualize other dimensions using common, every day items. It then makes it easier to understand the analogy between the third dimensional world and the fourth by using this method. For me, common items consisted of office supplies. An unfolded paper clip could represent a line. A pencil is also a good representation of a line. A piece of paper can be used to represent a two-dimensional plane. The paper I used was initially part of a sticky-note pad. The third dimension can be easily represented by using the sticky-note pad because the two dimensional paper then has the added dimension of thickness. A ream of paper or a tablet of paper can serve the same function.

more at URL ...

Answer 2

Some of these answers have good information and some are pretty wacky. Skip the time is the fourth dimension stuff because it is not a spatial dimension and I assume that is what you are talking about. I would argue that if the universe is curved then there has to be a fourth spatial dimention for it to be curved into. Think of a sphere. The surface of the sphere is two dimensional but it has been curved in the third dimension into a sphere. If you lived on the surface of that sphere you would be able to do experiments - say measure the area of a circle - to determine if your space is curved or flat. Draw a circle on a flat piece of paper and the area is pi*r^2. Draw a circle of the same radius on the surface of a sphere and the area will be less than that. In our space we would be measuring the volume of something. Use a sphere. It's volume if space is flat would be exactly (4/3)pi*r^3. If not flat it would be something else. Of course you would have to measure a very large sphere since local space would almost always approximate flat space.

As someone said dimensions are counted by the number of mutually perpendicular lines you can have at any given point. A flat piece of paper only has two, we have three. Now if you can only figure out how to draw a fourth then you will be able to move in the fourth dimension. Think of that flat piece of paper and two dimensional people living on it. Their walls are just lines which they can not see beyond but you, being 3D can. Same with a 4D person. Our houses, buildings, everything is open to them. Even the insides of your body. If you could step into the fourth dimension you would instantly vanish even though you might only have moved a tiny distance in that direction. It is a direction that we can not move or see into. But if you looked back into out space from the fourth you would not see like a 4D person because you are only 3D. You would see weird stuff. Think about that 2D person living on a plane. If you pick him up his eyesight would still be a plane and his view into his own space would be that of a plane intersecting a plane - a line - so he would see strange parts of the insides of things and other people. But it would only be a slice and from a strange perspective. Think about it. To get some insight into a fourth dimension think about a 2D world and how it works and how a 3D person can interact with it, etc. And then extend this to thinking of our space and how a 4D person would interact with it. Interesting stuff.

Answer 3

There are more according to da calculations. Unfortunately we can't visualize them, that might be the reason why quantum physics and general relativity can't be put all together.

Here's an example. When you see a cable from a big distance how many dimentions do you see? Two right? Height and Lenght like a rectangle.

But when you get closer, you'll see the third one, which is Width ! Thats why they call it a 3-D rectangle :D

Stay there a year, you'll see the cable change ! That's the fourth dimention ( or maybe not) which is time (rate of change).

So the other dimentions are a variation of the first 3, width lenght and height.

Some people say that the other dimentions can't be pictured or visualized b/c we don't have the capability, we are blind in that way, its like we need a 6th sense.

But popular belief relates dimentions with parallel universes.

Answer 4

It all depends what kind of dementia the observer is experiencing ,when he is trying to observe and interpret the Volume of the Universe and its contents.
What one see as four dimensions another sees it as only three dimensions.ONe may see reality the other sees an illusion.
Some observers see the Universe as 26 dimensions. Others are able to see the Universe as an "n" space dimension.

It all depends what kind of observer is looking at the Universe.
However we all know that when we die ,we enter a different dimension.
One is called Hell the other is called Heaven.
However Heisenberg Uncertainty principle indicates that it is uncertain to know who has gones into which dimension.
.The reason is that we cannot know momentum and location at the same time.
Also you have to be carefull what movies you watch and which ones you believe.
PS; Time is not a dimension its a quantity just like mass is a Quantity. Because Time cannot be expressed as a vector.
If time was a dimension ,as some believe, then frequency would also be a dimension ,and an inverse dimension at that.

How come frequency is not mentioned as a 5th dimension?

Answer 5

Some people have actually speculated that there are many more than 4 dimensions, but that we are just unable to perceive them and to something that is "more dimensional" than us, we would seem like two-dimensional.

I have also heard TIME considered the fourth dimension as we expand across time in a similar way to the three other (more-spatial) dimensions. I have a friend that has a book on all this, but I just realized she never showed it to me and so I don't know what it's called, but it seems very interesting...

Answer 6

If you knew your longitude, latitude and elevation these would be the three dimensions of your location. Write these three numbers down next to the current time. There you have it four dimensions. The fourth dimension is not a spacial dimension, it is just time, that's all. Nothing mysterious in of itself. When you talk about the physics of four dimensions things get a little more complicated, but even then, the fourth dimension is just time.

Answer 7

If you define a dimension as a measurable variable in space then, say a hinged bar (nun-chucks) would have 4 dimentions, since they would exist in 3 dimensions, plus the position of the bend in the nun-chucks would be a 4th variable.

Time could also be considered a 4th dimention.

A 4th spacial variable, similar to the 3 we know would not be detectable by humans, or any of our equipment that I know of. We can only figure out what it would be like using logic and our knowledge of these 3 dimentions.

Answer 8

There are many dimensions. The only problem is that we can't visualize them.

The fourth spatial dimension is simply the dimension that is perpendicular (or more correctly "orthogonal") to the previous three, just as the third dimension is perpendicular to the previous two.

There are other dimensions besides spatial dimensions. Time is often considered a fourth dimension, for example, though it is not a spatial dimension.

Answer 9

TIME is the 4th dimension and the 5th would be space......
A surface is 2 dimensional,volume is 3 dimensional.
Can u tell me a 4 dimensional quantity..?? I guess it could be a 3 dimensional object changing with time..e.g. filling a balloon with air......

Answer 10

yes, there is a forth physical dimension.

to think of successively higher dimensions, you have to draw right angles.
start with a 1D line. draw a right angle, straight up on the paper. the flat space defined by both lines is 2D, the surface of the paper.
now draw another right angle. you can't do it on the paper, you have to go up, above the paper. that is the only way to draw a line that is at right angles to both 2D lines. that moves you into 3D, or up into space.
if you could draw another right angle, that would be the 4th dimension. of course we can't do that, but if you could, it would look like this:
http://images.google.com/imgres?imgurl=http://www.daviddarling.info/images/tesseract.jpg&imgrefurl=http://www.daviddarling.info/encyclopedia/T/tesseract.html&h=288&w=390&sz=21&hl=en&start=1&um=1&tbnid=rg8cN7q13FrX1M:&tbnh=105&tbnw=142&prev=/images%3Fq%3Dtesseract%26svnum%3D10%26um%3D1%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DN

and yes, time is another way to think about it.
technically, time is the shadow cast by the 4th dimension onto the 3rd dimension.
just like a 3D object can cast a 2D (flat) shadow, the 4thD can cast a shadow onto 3D, and we experience that as time.