The major cause of blurred and unsharp images of objects observed through very large telescopes at the extreme limit of magnification is the
A) poor tracking capabilities of modern telescopes.
B) poor optical polish achievable on large mirrors.
C) clumsiness of the telescope operator.
D) air turbulence in Earth's atmosphere.

Question

Quizplus · Accepted Answer

Air turbulence in Earth's atmosphere causes the images observed through very large telescopes at extreme magnifications to appear blurred and unsharp. This phenomenon, known as "atmospheric seeing," distorts the light coming from celestial objects before it reaches the telescope.

The Major Cause of Blurred and Unsharp Images of Objects