Dear Physics 129 students

I understand that many of you are currently busy with midterms.
To help you out a little bit, I am extending the deadline for Homework 5 
from Friday Feb 22, 5pm to Monday Feb 25, 5 pm.  Good luck on the midterms.


Also, in Homework 5 Exercise 1 one of the inline equations is not 100% clear.
It says
k = sinAlpha/2
which means
k = sin(Alpha/2)
not
k = (sinAlpha)/2

I will fix it later tonight.  Sorry for the confusion.

C.