What is the name of the process that Alvan Graham Clark used to grind and polish the lenses for his refracting telescopes?
Diamond turning
Ion milling
Figuring
Electroforming
Answer
Alvan Graham Clark used a process called figuring to grind and polish the lenses for his refracting telescopes. Figuring involves carefully shaping the lens surfaces to achieve the desired optical properties, ensuring high-quality and precise observations.
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