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Liquid mirror telescopes

Author:      yih-hua h kiang
How does a liquid mirror telescope work? 

Response #:  1 of 1
Author:      samuel p bowen
The simplest idea is to rotate a liquid about the central axis and let its
shape change under the rotation.  This can give you a shape that could focus
a light ray.  The surface would be clean and have no impurities.

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