User talk:31.217.30.209

February 2021
Hello, and welcome to Wikipedia. This is a message letting you know that one or more of your recent edits to Dispersion (optics) have been undone by an automated computer program called ClueBot NG.

Thank you. ClueBot NG (talk) 19:12, 21 February 2021 (UTC)
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 * The following is the log entry regarding this message: Dispersion (optics) was changed by 31.217.30.209 (u) (t) ANN scored at 0.897524 on 2021-02-21T19:12:27+00:00