Day 9 – Measure a hair with a laser beam

Okay, so this is not part of my class today.  But I also mentor the science club.  Yesterday, I saw a tweet by Rhett Allian : How to Measure the Width Hair With a Laser!( Link )  I knew I had to try it.  My set up is below.  We were able to calculate 59 um!  Pretty good!  Since our physics class doesn’t do E/M, we always do a day or two on light in chemistry.  I look forward to having students white board particle and wave theories.

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