It is difficult to improve the angular resolution of optical telescopes located on the surface of Earth beyond a certain limit because:
A) large telescopes are always reflecting telescopes, and they suffer from too much chromatic aberration.
B) spherical mirrors suffer from too much aberration.
C) star images are distorted more by air turbulence than by the telescope optics.
D) improvement would require much larger, very expensive telescopes to enhance the inherent telescope.

Question

Quizplus · Accepted Answer

The distortion caused by air turbulence, commonly known as "seeing," limits the angular resolution of telescopes on Earth more than the telescope optics. This is why many modern telescopes are located in space or in high-altitude locations to reduce the effects of atmospheric distortion.

It Is Difficult to Improve the Angular Resolution of Optical