What is the most important reason why optical telescopes are often built on mountaintops?
A) The air is thinner.
B) The atmosphere is more steady.
C) The view of the horizon is not obscured.
D) The air is drier.

Question

Quizplus · Accepted Answer

Building optical telescopes on mountaintops helps to minimize atmospheric distortion, as the atmosphere is more steady at higher altitudes, providing clearer and sharper images of celestial objects.

What Is the Most Important Reason Why Optical Telescopes Are