User talk:122.170.99.176

Your edit to Light and optics
Hi - I am not an expert in such matters, but your contribution to Light and optics seems to constitute commercial promotion for www.glassballlens.com/. I have tentatively deleted it, but urge you to discuss this further. To respond, type a colon : at the beginning of the next line. As an IP editor, you don't need to sign. But please don't place such external links on Wikiversity until we get this sorted out. And...

Welcome to Wikiversity! --Guy vandegrift (discuss • contribs) 13:51, 1 January 2016 (UTC)