The Arrow of Time: Studies in Entropy, Decay, and Timekeeping

Amitabh Lath, Professor in the department of Physics and Astronomy, wanted his Honors Byrne seminar students to come to grips with the concept of time.  For a final project they constructed devices to measure one hour as accurately as possible. Various ideas were showcased, from an old-fashioned hourglass made of soda bottles to an electronic device that measured the drop in light output of glow-in-the-dark paint.  Others counted the turns of a water wheel, measured how fast soda went flat, and a couple used fancy gearing to slow down an electric motor.

Photo credit: John O'Boyle