The following resources may be useful for those who need a refresher in Optics Theory. The best resource at UofT to learn Optics is to take ECE318. The below options are okay substitutes which require a quantity of discipline for self-learning.
Optics Academy YouTube Video Lectures:
Textbooks:
Giancoli 2014. Chapters 23-25
This is a high-school physics textbook
Pedrotti 3rd Ed. - Introduction to Optics
The undergraduate optics course is based on this book. It is still very accessible but takes time to read.