![]() ![]() ![]() Image 1: 4D printed claw modifying its shape. These are just some of the possible applications that 4D printing technology is envisaged to realise. ![]() For these researchers, the answers to complex problems in the 3-D world may be found in the next dimension - and beyond.What if pipes could automatically fix themselves if they crack or break, or clothes could change according to the weather or the activity the user is doing? Furniture that assembles itself, prostheses that adapt to growth. String theory, for example, relies upon at least 10 dimensions to remain viable. If we can't use the fourth dimension to time travel, and if we can't even see the fourth dimension, then what's the point of knowing about it? Understanding these higher dimensions is of importance to mathematicians and physicists because it helps them understand the world. Thus, traveling to the past has been deemed near-impossible, though some researchers still hold out hope for finding wormholes that connect to different sections of space-time. While we can move in any direction in our 3-D world, we can only move forward in time. Researchers have used Einstein's ideas to determine whether we can travel through time. Today, some physicists describe the fourth dimension as any space that's perpendicular to a cube - the problem being that most of us can't visualize something that is perpendicular to a cube. Einstein described gravity as a bend in space-time. Science fiction aficionados may recognize that union as space-time, and indeed, the idea of a space-time continuum has been popularized by science fiction writers for centuries. ![]() In his theory of special relativity, Einstein called the fourth dimension time, but noted that time is inseparable from space. Our brains aren't trained to see anything other than our world, and it will likely take something from another dimension to make us understand.īut what is this other dimension? Mystics used to see it as a place where spirits lived, since they weren't bound by our earthly rules. The sphere can't comprehend a world beyond this, and in this way, stands in for the reader. Emboldened, the square asks the sphere what exists beyond the 3-D world the sphere is appalled. He sees not just lines, but entire shapes that have depth. Eventually, the sphere takes the square to the 3-D world, and the square understands. On first glance, the sphere just looks like a circle to the square, and the square can't comprehend what the sphere means when he explains 3-D objects. One day, the square is visited by a sphere. Living in 2-D means that the square is surrounded by circles, triangles and rectangles, but all the square sees are other lines. In "Flatland: A Romance of Many Dimensions," Abbot describes the life of a square in a two-dimensional world. Abbot published a novel that depicts the problem of seeing dimensions beyond your own. Because we only know life in 3-D, our brains don't understand how to look for anything more. Physicists work under the assumption that there are at least 10 dimensions, but the majority of us will never "see" them. And that, according to many researchers, is the reason we can't see the fourth dimension, or any other dimension beyond that. But for someone who's only known life in two dimensions, 3-D would be impossible to comprehend. The things in our daily life have height, width and length. We can imagine existing in such a world because we live in one. But when we put on those 3-D glasses, we see a world that has shape, a world that we could walk in. Most of us are accustomed to watching 2-D even though characters on the screen appear to have depth and texture, the image is actually flat. The success of 2009's "Avatar" demonstrates that moviegoers appreciate the difference between 2-D and 3-D, and they're willing to pay a little more for an upgrade. ![]()
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