This is pretty awesome. Scientists at Harvard Science Demonstrations put out a video earlier this year that let’s us see air moving with our naked eye. The team assembled some Schlieren optics (which we’ve talked about before) by reflecting a light source from a concave mirror onto a razor blade. The optics are setup in front of a camera to record as they demonstrate the process with a hair dryer, an air filled helium balloon, and a big glass full of sulfur hexafluoride gas. You can get a preview of the setup in the image above, but be sure to watch the video for the full effect, especially if you’re not familiar with Schlieren. [Read more…]
Okay, Schlieren photography is still pretty awesome. I’m actually still quite fascinated with our ability to photograph sound waves. I also love that I can do it myself for less than $10. But, this project announcement from MIT is pretty wicked, too. Scientists from Microsoft, MIT, and Adobe have developed a way to use similar science to recover the audio from images taken using high speed cameras and even a prosumer level DSLR.