View source for In Section 9.3 there are equations that use the variable 'n' when it should be 'w'

{{Errata
|Book edition=Second
|Version number=3.0h
|Submission date=11/7/2016
|Your name=Chanud Yasanayake
|E-mail address=cyasanay@caltech.edu
|Chapter number=9.3
|Page number=9-15
|Line number=16
|Current status=Closed
}}
In the second row of equations it says "y = n + eta" when it should be "y = w + eta". It should also say w instead of n in "y,n,eta,v,u,e elements of E" as well as in the next couple of lines of equations.