In this video, we see a dramatic demonstration of standing waves patterns, which form when travelling waves constructively and destructively interfere as they pass through one other.
Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing
Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed
Share links with friends, comment on stories and more
In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.
Check out the best of what's new here.

from Grand Rapids, MI
Another interesting thing about these shapes is that they appear carved in the Rosslyn Chapel in Scotland which was built in the 1500's. Many people try and "decode secret messages" from them, one father-son team even took it so far as to write a piece of music based on the pitches that correspond to the shapes. While I doubt the ancient Scottish pontiffs had secret advanced technology that would allow them to encode secret messages into the architecture in their church it is interesting that these images appear pretty closely reproduced. There are some other weird things. I'm no conspiracy theorist but history is interesting. Here's the wikipedia entry. Not much info. but interesting to gloss over:
http://en.wikipedia.org/wiki/Rosslyn_Chapel
who would have ever guessed that a simple frequency could do such a cool thing with art. that is simply amazing to me!