Which type of binary can have their sizes measured directly by photometry?
A) virtual
B) astrometric
C) visual
D) eclipsing
E) spectroscopic

Question

Quizplus · Accepted Answer

Eclipsing binaries can have their sizes measured directly by photometry because the light from one star is eclipsed by the other star, causing a decrease in the total brightness of the system. The amount of decrease in brightness depends on the size of the eclipsing star and the duration of the eclipse.

Which Type of Binary Can Have Their Sizes Measured Directly