The angular resolution of a ground-based telescope is usually set by
A) diffraction.
B) refraction.
C) the focal length.
D) atmospheric seeing.

Question

Quizplus · Accepted Answer

The angular resolution of a ground-based telescope is usually limited by atmospheric seeing, which is the blurring effect caused by the fluctuation of air density and temperature in the Earth's atmosphere. This limits the ability of the telescope to sharply resolve fine details in celestial objects.

The Angular Resolution of a Ground-Based Telescope Is Usually Set