2007-12-23 03:50:09 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
I think you are asking is there anything tangible and real that is 2D. If that's your question, then the answer is no. We live in a 3D spatial world. For mass to exist, there has to be three dimensions.
Of course, as some answers have indicated, we can always do mathematics in 2D. For example, the shadow of a 3D sphere cast on a screen is 2D, but it is not tangible and real. We can even cast an imaginary shadow (called a projection) of a 2D thing onto one dimension (1D). But none of these projections is real; they are simply mathematical constructs.
When/if you take curvilinear coordinates in vectors analysis, you'll learn all about projections of higher dimensions onto lower ones.
2007-12-23 04:16:05 · answer #1 · answered by oldprof 7 · 2⤊ 0⤋
Well ya 2D things are possible, and on a graph a computer can add or remove as many dimensions as it wants (as its programmer wants I mean). It's just impossible for the computer to show anything to us that's not 3D because we live in a 3D world. The easiest way for me to imagine something 2D is to think of it as a shadow or an outline, but even that's not very effective. I think that nothing big enough to see without an electron microscope can be two dimensional, at least not on Earth.
2007-12-23 04:01:26 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Even though we live in a 3d universe, we still use 1d and 2d dimensions to help us in every day live. Ever use a ruler? You're measuring in 1d. Ever find out the area of a floor or a wall? That's a 2d measurement.
2007-12-23 04:09:46 · answer #3 · answered by Jonathan P 2 · 1⤊ 0⤋
No real two dimensional, only the concept for instruction purposes.
2007-12-23 12:42:15 · answer #4 · answered by Psyengine 7 · 0⤊ 0⤋