Hecht errata

The list of errors Andrew pointed to is here.

In addition, Andrew noted

There appears to be an error in Hecht's book on page 651 in the magnetic equation of telegraphy (A1.20). The first equality sign should be a subtraction operator. This isn't noted on Chris Mack's errata sheet.

I'll keep updating this post as we find more things. The solutions manual that accompanies the book is rife with errors, it is probably a losing battle to try and write all those down for the few (or none) of you that have it.