Knowledge of waves

What do you know about waves now, then what you knew before?

• Now i know a lot more, because now i know more types of waves and how they work. Also how they move and how they effect in good ways and bad ways. Like irradiated waves, they can be bad because they can cause a lot of bad sicknesses. 
• Also there are X rays which i knew before because i broke my arm and then i saw my arm. Also i could see my brain.  
• The thing i most liked was the ultraviolet, because it was very interesting and it ad a lot of interesting facts to explain to me what it does and how it can help and not help. 
• I wouldnt change anything because i thought me and Mary did a very good job with the info and how we set it up.