hey guys ...as some of you may know, we are having a science exhibition in Royal College Colombo 07. And I'm exhibiting two items

01) Night Vision Goggles

02) A presentation explaining the 4th Dimension

So I thought of giving the explanation over here in the forum so that you guys might learn something from it , and if I get something wrong please do correct me ,

So its like this , In a 1D world there is only one dimension : length ...as in a simple straight line, just like a side look of a piece of paper (*without considering the thickness of it*) So If there was a living being or an entity (hypothetically speaking ) inside of that line it could only move forwards and backwards .

then comes 2D , a 2D world implies that there are two dimensions : length and width ,

a 2D world is made out of several number of 1D worlds put together side by side ..think of it as this : if you draw a line and then draw another line next to it and keep doing that for a while you would end up making a rectangle ,which have both width and a length. so an A4 sheet is made out of infinite number of lines (1D worlds ) combined together .

if there was a living being inside of it ,it could move ,forwards ,backwards,left ,right ..

then comes 3D(our world) , in a 3D world there's width , height, and length..a 3D world is made out of several number of

2D worlds. just like a book .a book(3D world) is a collection of papers(2D worlds) .if there was a living being inside of it ,

if can move in any direction : forwards ,backwards,up,down ,left ,right ..

SO HOW IS A 4D WORLD CREATED ??? ... like before , its a compilation of 3D worlds .

but you cant just put one 3D world atop another to make a 4D world , then It'd be like building blocks .you would end up with another bigger 3D object ! you have to assemble them in the forth direction. even before if you kept combining a line at the end of another line ,it'd make a longer line ...NOT a 2D object ..and if you kept placing papers aside papers you'd only have a larger paper , not a 3D object ..the reason you got those correct objects is because you assembled them in a higher direction .

in order for you to understand this , consider this . a line is the basic 1D object , A square is the basic 2D object ,a cube is the basic 3D object , and a hypercube (Tesseract) is the basic 4D object .follow this link to have a look at it and to find out how its made

Consider : 2D creatures (entities or any living being) can only see in one dimension, if you draw a line on a paper and placed a dot in front of it (consider the dot as the 2D creature) the dot can only see one side of the line , it cant see the other side ,but since we are looking from above ,we can see all the sides and all the angles.

similarly 3D creatures can only see things in 2D . YES !! THOUGH YOU THINK THAT YOU SEE IN 3D ! YOU DON'T !

the reason that we can tell that something is 3D is because ..hmmm if you looked at a boll the reason that you can that it is a ball and not a circle is because the contrast of the light (hue , brightness , etc) .the light is brighter in middle and gets slightly darker at the edges.

how do you tell that the ball is either near to you or far way from you ??? if the ball gets smaller than the original size its getting away from you , if it keeps growing its getting closer to you . thats the basic concept we all know. but what if the ball kept GROWING as it went further away from you ? you wouldn't realize that its moving , you would think that its still where it was before , this is because we see things in 2D in a 3D world.

just like this : if you took a rubber thread and place it on a paper . put a dot in front of it (the dot is the 2D creature ) .then while you take the rubber thread faraway from the paper if you expand by pulling from the ends , the 2D creature will not realize that the rubber thread is moving, because its increasing by the size as it gets further ..but we see what really happens , because we see the 2D world in 2D ...so as the 2D creature sees his 2D world in 1D we see our 3D world in 2D ..

if a 4D creature looked across a 3D world he would see all the angles ,sides everything as they are ...not like us , if it looked at a cube he'd see all the sides of the cube at once in a single glance ...

NOW theres another theory saying that the 4th dimension is TIME , this is a common misconception.now if we take how each of these worlds are created , there's a noticeable sequence ...one spacial dimension is connected to another .

but TIME is not spacial is it ??? so that doesn't make any sense at all . if 4D was time , then that dimension is special from the rest , that cant be ....as it happens there are an infinite number of dimensions , but if the 4th dimension was time the sequence would break and that'd be the last dimension .

AS a fact dimensions are within one another, 1D is inside 2D , 2D is inside 3D ,and inside 3D all the other lower dimensions can be seen (1D and 2D) , and 3D should be inside 4D .....but if the 4th dimension is time , we wouldn't see the other dimensions inside "time" and you cant find 3D inside time ...SO that proves that the 4th dimension is spacial , and not time ..............

thats my explanation !! please leave your comment on this , it would help me alot . thanks !