What is 4D?

Answer 1

4D refers to a coordinate system made of 4 axes, all at right angles from each other.

In common use 4D generally refers to coordinates in 3D Space/Time. 3 of these coordinates are in space. The fourth is the position in time, where time is considered mathematically as a fourth axis that is at right angles to all other axes. 3D space/time geometry is at the heart Einstein's equations of physics.

4 Space, or four dimensional space is like 3D space/time except that the fourth dimension is not considered to be position in time but rather a fourth spatial coordinate that is along an axis at right angles to all other axes. So called "hyper-cubes" and "hyper-spheres" are 4 space equivalents of spheres and cubes. The easiest way to understand 4-space is to think first off about 2-space, or 2D objects. A circle is a 2D object. A sphere is the extension of a circle into the 3rd dimension to make a 3D object. A hyper-sphere is the extension of that Sphere into the fourth dimension to make a 4D object. A 4D hyper sphere has the same relation to a normal 3D sphere as that sphere has to a 2D circle. Note that the term "4D" is also misused in all sorts of marketing jargon to mean other things. The scientific term for this usage is "nonsense."4d is like when you go see a movie you feel it like in sea world a movie was in 4d and water splashed me in the face

Answer 2

four-dimensional describes something existing in four dimensions. The "real world" which we experience is often referred to as three-dimensional, meaning that any location can be described by only three coordinates. These coordinates are usually thought of as forward - backwards, left - right, and up - down, and with some nominal reference point as a datum. Often the real world is treated as four-dimensional, with time as the fourth dimension. Then, with some reference point and date we can describe any location at any point in time as well. Another way of puting it is, it is time.

Answer 3

4-D is the same as 3-D but except in 4-D u can feel it......not feel it but like it looks like its actually there

Answer 4

Length X Width X Depth X Time 4D