What is so unique about the mirrors of telescopes such as the Keck Observatory, Gran Telescopio Canaries and the soon-to-be-built Giant Magellan Telescope?
A) The mirrors are made of a newly designed metallic material.
B) The mirrors can fold up went not in use.
C) The mirrors are inexpensive.
D) The mirrors are segmented.
E) The mirrors are thin.

Question

Quizplus · Accepted Answer

The mirrors of these telescopes are unique because they are segmented. This design allows for the construction of very large mirrors necessary for advanced astronomical observations, by assembling them from smaller, more manageable segments.

What Is So Unique About the Mirrors of Telescopes Such