The Primary Mirrors in the 10-M Keck Telescopes Consist of

question 62

Multiple Choice

The primary mirrors in the 10-m Keck telescopes consist of

• A) a large hollow honeycomb of glass-lightweight but relatively thick to prevent sagging.
• B) a large, thin slab of glass whose surface is continuously adjusted by computer-controlled motors.
• C) six individual mirrors, mounted so that they all bring the light to the same focus.
• D) 36 individual mirrors, mounted so that they all bring the light to the same focus.

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