User talk:223.189.9.24

April 2018
Hello, I'm StartTerminal. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Geometrical optics— because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help Desk. Thanks. startTerminal (haha wow talk page | startTerminal on irc) 03:37, 20 April 2018 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did at Geometrical optics. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism can result in the loss of editing privileges. Thank you. UnsungKing123 (talk) 04:13, 20 April 2018 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself or logging in with an existing account so you can avoid further irrelevant notices.