The Arizona Humanities Council presents Matthew Whitaker speaking on "A Quest for Freedom: The Modern African Diaspora" at 12:15 p.m. at the UA Museum of Art.

Meinel Optical Sciences Center Colloquim presents "Applications of Interferometry," by Bob Guenther at 3:45 p.m. in the Meinel Optical Sciences Center, Room 410.

Yitshak Zohar speaks on "Microsystem Technology and its Applications" as part of the AME Seminar Series at 4 p.m. in the Aerospace and Mechanical Engineering building, Room S212.

Sam Stephenson talks about W. Eugene Smith's unfinished "Dream Street" photographic collection at 5:30 p.m. in the Center for Creative Photography.