What are the 4 dimensions (4D) and what does everyone mean?

Question

A simple answer please!

A simpler answer than the first two, with alot of information (if you can), and list your source (if you know it) so I can see more. Thanks!

Answer 1

Imagine you put a yardstick on the floor facing exactly north and south. That would be the first dimension. Moreover, north and south anywhere in the room would also be the first dimension. Now, put a second yardstick down on top of the first but facing east and west so they look like a big plus sign. That would be the second dimension. Notice, and this is very important, the two yardsticks are at right angles to each other - 90 degrees. All dimensions must be at right angles to each other. Now, put a third yardstick with the other two but remember, it must be at right angles to BOTH of them. There is only one way it can be oriented - in the center of the plus sign standing straight up and down. This is the third dimension. Take time either to try it or to actually build what I have just described using rulers or pencils and satisfy yourself that all three dimensions are actually 90 degrees to each other. Now go one step further. Can you add another yardstick (or pencil) which is at right angles to ALL THREE of the others? Before you exprience brain burnout I'll answer that for you. No - although you might like to try. You can't do it because we live in three dimensional space. However, many scientists feel that there is a fourth dimension although it can't be drawn or built - just imagined. Remember, it would have to be at right angles to each of the three spatial dimensions. Many scientists think the fourth dimension is time. No matter how we turn or in what direction we face, time is always like a yardstick facing behind us into the past and forward into the future. Remember, this is just a theory, an idea supported by many facts and observations but one which has not yet been proven. Are there more than four dimensions? Possibly. In math we can have as many dimensions as we want but math is strictly a mental exercise. The fact that math so nearly predicts what the actual universe is like is a tribute to the perfection of the universe.

Answer 2

AFAIK there are actually two views of the fourth dimension. One view, which was stated in H.G. Wells' famous book 'The Time Machine', is that 'time' constitutes the fourth dimension. Well, to think about it, this view does make sense, because an object can only exist if it has an existence in time.

Then there is of course another way to look at it. Just think about what it means to be in zero-dimensional space. This is the equivalent of dumping all the matter in the universe into one single point of sero-dimensions. So you, your neighbor and the girl nextdoor will all be confined to this point. There is no way to get there from here, because both 'here' and 'there' are in the same point.

Then think about being in one dimensional space. To imagine this you can envision living inside an infinitely long piece of thread. Then if you take that thread and move it in a particular direction perpendicular to the line of the thread, you'd get two dimensional space (which is basically a plane). Then take the plane and move it in a direction perpendicular to the plane to get the third dimension (which is a solid body). Do the same thing to the solid body.. and you ought to end up with the fourth dimension.

I know it's a little tough to wrap ya head around, but it's not difficult to think about it, if you analyze the three dimensions that you're already familiar with.

If one day some creature living in a four dimensional world were to visit us, he/she (or it?) would be able to pluck us out of this 3D space without any problem. And we'd all instananeously disappear into thin air (or rather into that extra dimension) ....

:)

Answer 3

From our perspective, we live in a three dimensional world. Objects can be moved in three different ways -- side to side, up and down, and back and forth. For most of human history, it was believed that reality existed in just those three dimensions, with time just constantly running in the background. However, around the turn of the 20th century, scientists began to wonder if time could also be considered a dimension -- that is, what if instead of an ever-present clock, time was another direction in which we could "move". This realization, that time was another dimension, lead to some spectacular scientfic developments, most notably Einstein's theory of relativiy. So, to answer your question, the four dimensions refer to the three spacial dimensions plus time.

However, in the field of mathematics, four dimensional simply refers to any problem in which there exist four independent variables -- that is the system which is being studied has four parameters which can be varied without affecting each other.

Answer 4

The four dimensions of spacetime are the three spacial dimensions, x, y, z plus the time dimension expressed as i*c*t, where c is the velocity of light and i=√-1. An interval in spacetime is expressed as
(∆s)^2 = (∆x)^2 +( ∆y)^2 + (∆z)^2 - c^2*(∆t)^2

Answer 5

The four dimensions are x,y,z and time. This fourth dimension i suppose comes from Uncertainity principle that states that it is impossible to determine the position of the moving(fast or slow) particle without considering time factor. Thats why when we talk about space we consider time as a major factor and vice versa too.

Answer 6

The concept of a fourth dimension is one that is often described in considering its physical implications, that is, we know that in three dimensions, we have dimensions of length, width, and height. The fourth dimension is said to be at right angles to these three, and is often described as time. As the cardinal directions in the three known dimensions are called up/down, north/south, and east/west, the fourth dimensional terms are ana/kata.

Answer 7

In order for you to exist, you must have depth, breadth and height (the three spatial dimensions, familiar to us all ). But you must also be here for a moment in time - the fourth dimension.

Another way to look at it is this if I invite you to a party, in order for you to be in the right place at the right time I must give you 4 specific items of information: the road you need to come to, the building you need to come to and the number of the floor you need to come up to. All this would be useless without also giving you the time to be there. Therefore, time is the fourth dimension.

Answer 8

you know the 1D x, which is the horizontal axis
you know the 2D x and y
you know the 3 dimensions x, y and z right?
Ok just add to them another dimension t which is for time
then the points will be moving according to (x,y,z,t)
locating a point on the 4D axis will depend on its location on the x-axis, the y-axis, the z-axis and time

Answer 9

i use to go to the cemetary and take pictures.get things such as weird faces looking out from trees.i took a photo next to a head stone with a freemason symbal on it,i captured a full bodyed appercian of what oppeared to be a hooded figure of what appered to have the exact same facial features of he scream movie guy,and next to his feet appeared to be something longhaired kneeling,and it almost loo ed as if it was on a leash of some sort.anyway once i developed the photo i sent it to the atlantic paranormal society for an out side opinion but they never mailed me back nor did they retun my photo which sucked since it was my only copy.i quite ghost hunting though cus i got a gf.XD happie ending