Verb conjugation of "refract" in English

Great pictures. This looks very promising! At what time do you need to be back on Monday? I may have to return early on Tuesday as well, because my daughter's and my son's birthday are on the same date.
I have sent you my e-mail address. If you want to write me there, I could view the messages immediately. It would be easier than on the Vocabulix forum, as I'm not online often enough.
I can already speak a little English but not too well. So I'm more cautious about making mistakes. I want to improve my English, because it is also good for your confidence and communication skills.