homework for Monday,
September 24, 2007
Unlike
on the JIT, this time you have to show all work/calculations
I am expecting you to do these problems on your own, without
consulting other people, me excepted; please sign a statement to that
effect at the end of your homework.
I will be available by email this weekend. I will also be
available in person (and the labs will be open so that you can use the
image processing programs) Saturday morning from 10 am - noon and
Sunday from 11 am to 1 pm. Plan ahead!
Problem 1 MUST be done by and brought
to class on monday
1) For transitions involving
level 4 and a higher level in the hydrogen atom,
a) calculate the changes in the electron energy that will result in the
three longest possible wavelengths.
b) show these transitions on an energy level diagram
c) calculate the wavelengths that are absorbed (or emitted) in these
three transitions
(please do NOT use equations 31-1 or 31-2 .... use the ones that were
on the board in class Friday.... the ones with numbers in)
2) Do this problem If you DIDN'T do it
correctly on the JIT:
show convincingly that it is possible for a hydrogen atom to emit or
absorb a radio photon by
(and you can do the following parts in any order)
a) finding a specific transition (i.e., what is the initial and final
n?) that produces a radio wavelength
b) calculating the appropriate energy change of the electron (= energy
of the photon) in ev
c) calculating the resulting wavlength (and make sure it is in the
radio!)
3) Go through the images in lab 1 (the
image processing lab) and
a) list EACH object that is shining by fluorescence
(presumably you know what state(s) of matter an object must have to
produce an bright-line/emission spectrum;
if not, you can always go back and read the appropriate Kirchhoff law
stated in the book)
b) list at least three objects -- as pictured in the image processing
lab -- that could not possibly have a bright-line spectrum
It is actually a good thing that you DON'T have the image processing
lab books; there's nothing in them that could possibly help.
You have to actually LOOK at the images. The image processing lab
instructions are still on the web page.
Please do not give a vague name such as "nebula" or an image name that
has multiple objects in it (such as "Coma" or "Cen-X3").
BE SPECIFIC. You can give the specific (proper) name or the
generic name of an object
and just so you know.... anyone who does not ace this assignment,
there will be another tuesday.... we need to get this stuff mastered....
if you need help from me, make sure that you get it early!