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 with a beautiful mountain view.
D)All of the choices are correct.
E)there is less air to dim the light and the seeing is better.

Question

Quizplus · Accepted Answer

Optical telescopes are built on tops of mountains because there is less air to dim the light and the seeing is better. High altitude provides less atmosphere above the telescope, which decreases the amount of atmospheric turbulence, leading to better seeing conditions (less distortion caused by the movement of Earth's atmosphere).

Astronomers Build Optical Telescopes on Tops of Mountains Because