Monthly Archives: January 2019

720° untangles 360° tangles

Despite growing up in three dimensions, as a kid I did not recognize one of 3D’s deep and subtle properties: full rotations tangle, but double rotations untangle! Following physicist Paul Dirac, twist a belt one full turn about its length. … Continue reading

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Wooster physics reunion in Eugene, Oregon!

I recently returned from a refreshing and productive leave at the University of Oregon in Eugene.  I received my own Ph D in the field of quantum optics at Oregon, and my leave was a great opportunity to continue work … Continue reading

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Luna’s Convex Orbit

Luna orbits Earth and Earth orbits Sol (where Luna is Earth’s moon and Sol is Earth’s star, the sun). As a kid, I thought Luna’s solar orbit formed a loopy spirograph pattern. Instead, Luna’s orbit is convex! Neglecting the eccentricity … Continue reading

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