I'm new here, I'm taking the PGRE in October and I'm just starting to take the practise tests. I noticed that I don't know a lot about optics, particularly the diffraction stuff. Is there any particular book people tend to use? I am using Hecht right now, but its not the greatest.
Also, any advice anyone can offer is very welcome. I've been prowling the forum for a while, but this is my first post.