HINTS for Homework #7 (Due Wed, Oct 16)

1a) Gas 5-146 and 5-147 should be helpful. You don't have to do much real work here, Gas has done it all for you. Just pull his results together. Remember, you want wave functions written as functions of x, (not y)

2) Perhaps thinking about the case of the delta function potential provides a useful "extreme" to clarify the flaw in the argument...

3) Before you begin calculating, just think a bit about this one; try to make a sketch or two of what the wave functions should look like, and then you'll be able to better recognize if your algebra is getting you the right answer.

4) Look at Gas, eqns 5-90 to 5-93

Think!! before you do any painful integrals. .

(At the end, if your answer has 2 possible signs, how do you pick?)

5) Gas has done all the hard work for you here, as well. Make use of the formulas from 5-75 to 5-59...