SOME COOL REFRACTION STUFF.

Hey 2P! I've chanced upon this website about light refraction which I found quite easy to understand and maybe it could help a little!

http://zonalandeducation.com/mstm/physics/light/rayOptics/refraction/refraction1.html

Have fun studying and it's just a week more left! Jiayou and all the best (:

Signing off,

Yexin