User talk:42.105.116.193

June 2021
Hello, I'm Jackattack1597. An edit you recently made to Total internal reflection seemed to be a test and has been removed. If you want more practice editing, the sandbox is the best place to do so. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thank you. Jackattack1597 (talk) 12:57, 19 June 2021 (UTC)