User talk:2001:388:608C:6CB4:7C1B:B17C:9A09:B61B

June 2019
Hello, and welcome to Wikipedia. Although everyone is welcome to contribute positively to the encyclopedia, at least one of your recent edits did not appear to be constructive and has been reverted. Please refrain from vandalizing articles, as you did at Direct and indirect band gaps. If you wish to experiment, please use the sandbox instead. Continued disruption may result in the loss of editing privileges. Thank you.  Light and Dark2000  🌀 (talk) 02:53, 19 June 2019 (UTC)