Q: Are shadows 2-dimensional? Are there any real examples of 2-dimensional things in the universe?

Q: Are shadows 2-dimensional? Are there any real examples of 2-dimensional things in the universe?

It’s impossible to get something that’s genuinely 2-D in our universe for several reasons, the simplest of which is that atoms themselves are 3-D. That said, there are innumerable examples of things that behave as though they were 2-D. For example, ripples on the surface of water are an example of 2-D waves that behave very differently from ordinary 3-D waves. Weather systems that are substantially bigger across than they are tall, like hurricanes (e.g., Sandy was about 800 miles across, and only about 5-10 miles high), roughly obey 2-D fluid dynamics. However, very weirdly, in a 2-D fluid you find that the opposite tends to be true: energy starts out in small eddies and moves to larger.

About Us

When you want to outsmart the world, you turn to the facts. And the facts are in the science.

Subscribe to our newsletter!