4D


What is 4D ? 

         Before Understanding what is 4D ( 4th Dimension ) we have to know what is 1D , 2D and 3D . Before understanding all of this first we have to know what is Dimension . 

Dimension -       

         Dimension is a mathematical concept to describe the measurement of size , distance of and object , area or any space . In simple words it is the length , breadth & height of any given object . As length , breadth & height is compared to x , y & z direction so in all this thing is called as dimension . With this comes 1D ( i.e. one sided ) 2D ( i.e. two sided ) 3D ( i.e. 3 sided ) so on .

1D -

1D



          1D as we can see in the image there are some points on a space which can only move in 2 direction backward and forward . In other words there are two direction but the point will be in a single parameter that is it has only single path to move in .

2D -

2D


          2D as we can see in the image is the world where there is some kind of improvement image as we can see as the shapes has the freedom to move more direction than that of the points in 1D space . The shapes here can move forward , backward , left & right yet they can't move up & down direction the only thing here is that the shapes live in 2 parameter  that is 2 paths to move . 

3D -

3D

         3D is the world as shown in the above image where the creatures can move up , down , left , right , forward & backward so as we can see the above shapes and creature has the freedom to move in 3 paths .
         Now comes the main thing and that is humans are 3D creatures and can only see object that can move in X ,Y & Z axis beyond this comes another direction that can be called as K axis which makes the space to move a step beyond 3D and that is 4D in simple word . Now why humans can't find the object which is 4D space can be explained down here which will explain what really 4D is .

When a 2d creature looks at the object it finds the object in 2d just like this in image 
2D

 but for the creature in 3D the object may look like this 
3D

As soon as the intersected object moves backward of the screen for the creature in 3d might find like this 
3D

but the creature in 2D may find the object got shrunk and changed its shape ( here it is sphere so you might not find shape change but if it was other shape like octagon you might find a shape change too ) just like this 
2D

that signifies that when the object moves from 2d to 3d the 2d creature might not find the object same happens when the object moves from 3d to 4d . For us a Tesseract might find like a regular 3d object but it is some what you can find it like this 
4D


6 directional moves of tesseract.