Upon what data do measurements of sizes of eclipsing binaries depend?
A)their orbital periods and separations
B)their masses and luminosities
C)their Doppler shifts and durations of stages of their eclipses
D)their temperatures and speeds
E)their temperatures and masses

Question

Quizplus · Accepted Answer

Measurements of the sizes of eclipsing binaries depend on their Doppler shifts and the durations of stages of their eclipses. Doppler shifts provide information on the velocities of the stars as they orbit each other, while the durations of the eclipses give clues about the sizes of the stars relative to their orbital separation.

Upon What Data Do Measurements of Sizes of Eclipsing Binaries