Astronomy current events question: Einstein's general theory of relativity and PSR J0348+4032 binary system

Astronomy 210L, spring semester 2013
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)

Dave Finley, "Einstein's Gravity Theory Passes Toughest Test Yet," April 25, 2013
http://www.nrao.edu/pr/2013/gravitylab/

Researchers confirmed that changes in __________ from the white dwarf and neutron star pulsar in the binary star system PSR J0348+4032 are consistent with Einstein's general theory of relativity.
(A) hot spots.
(B) absorption line widths.
(C) radioactivity.
(D) brightnesses.
(E) radio pulse timing.

Correct answer: (E)

Student responses
Sections 30678, 30679, 30680
(A) : 2 students
(B) : 8 students
(C) : 8 students
(D) : 7 students
(E) : 25 students