Talk:Sagitta (optics)
Latest comment: 10 months ago by 208.104.196.99 in topic Sagitta reference
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Sagitta reference edit
Is there a reference to an optical source, like a textbook, where surface sag is specifically called the Sagitta? I have not found one. 208.104.196.99 (talk) 01:45, 15 July 2023 (UTC)