Eric Adelberger, a University of Washington professor emeritus of physics, will talk about “Testing Einstein’s Happiest Idea by Watching Things Fall Sideways” tonight at UNC Chapel Hill.

The free public lecture will take place in Chapman Hall 211 starting at 8 p.m.

Einstein’s happiest idea led him to his relativistic laws of gravitation, a fundamental force whose origins remain mysterious to this day. Adelberger will discuss the clever new innovations of recent experimental tests of gravity and their unexpected relevance for antimatter and dark matter.

Adelberger is a fellow of the American Academy of Arts and Sciences, the Institute of Physics and the American Physical Society. He is also a member of the National Academy of Sciences and a recipient of the APS Bonner Prize for outstanding experimental research in nuclear physics.

The event is sponsored by the UNC chapter of Phi Beta Kappa, the oldest academic honor society in the United States.