I did, however build a desktop laser interferometer today with a bunch of high school kids. Pretty cool - it totally worked, although you can't actually see the dark lines in the diffraction pattern on the paper in the photo. We also built some bridges from straws and tape - about as fun as it can get without lasers.
|Lenses and mirrors and lasers, oh my!|
|"Nobody said the span needed to be >1 inch."|
And thus concludes another STEM-con. (Science, Technology, Engineering, and Math!) Back to my regularly scheduled to-do list.