The Primary Mirror in the 10-M Keck Telescope Consists Of

question 280

Multiple Choice

The primary mirror in the 10-m Keck telescope consists of:

• A) one large hollow honeycomb of glass-lightweight but relatively thick to prevent sagging.
• B) one 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.