Astronomers build optical telescopes on tops of mountains because
A) there is less air to dim the light.
B) the seeing is better.
C) CCDs work better when there is less oxygen in the air.
D) all of the above
E) a and b

Question

Quizplus · Accepted Answer

Building telescopes on mountains reduces atmospheric interference, improving light clarity (less air) and seeing conditions. CCD performance is not significantly affected by oxygen levels.

Astronomers Build Optical Telescopes on Tops of Mountains Because