User talk:73.171.42.154

January 2021
Hello, I'm DanCherek. I wanted to let you know that one or more of your recent contributions&#32;to Book of Optics have been undone because they 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 Teahouse. Thanks. DanCherek (talk) 16:09, 25 January 2021 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

Please refrain from making unconstructive edits to Wikipedia, as you did at Book of Optics. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. DanCherek (talk) 16:10, 25 January 2021 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

Please stop your disruptive editing. If you continue to vandalize Wikipedia, as you did at Book of Optics, you may be blocked from editing.   Steve M (talk) 16:11, 25 January 2021 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

You may be blocked from editing without further warning the next time you attempt to make unconstructive edits which result in triggering the edit filter, as you did at Book of Optics. DanCherek (talk) 16:12, 25 January 2021 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

Notification: Blocked
 You have been blocked from editing for a period of 31 hours for Vandalism. Once the block has expired, you are welcome to make useful contributions. If you think there are good reasons why you should be unblocked, you may request an unblock by first reading the guide to appealing blocks, then adding  below. Materialscientist (talk) 16:26, 25 January 2021 (UTC)