Alright, so I'm a computer science major and for whatever reason I'm required to learn particle physics and things of that nature. Anyway, our book does not cover this so I was wondering if anyone can help. This is off a practice test for my final tomorrow:

5) (i) What is the energy and wavelength of a photon that gets emitted when the hydrogen
atom makes a transition from its first excited state to its ground state?

6)(i) State whether the following reactions are allowed or not. In each case state all
conservation laws that are respected and/or violated.
p + ¯p → n + e− + νe
e+ + e− → p + μ− + ¯νμ
g + g → b +¯b
K− + p → 0 + 0
(K is a meson,  and  are baryons)

(ii) Draw a Feynman diagram for the process
μ− → e− + ¯νe + νμ

also this:

(iii) The wave function of the ground state of the simple harmonic oscillator is given by
ψ0(x) = (mω/π¯h)1/4e−mωx2/(2¯h). Calculate the expectation values of the position and momentum
of the particle in this state. [Hint: Symmetry considerations may be useful in calculations
of integrals.]

 

Can I get a translation please?

 

I have no idea, but I'm pretty sure that (iii) is in Russian. Maybe try running it through babelfish.

 

So you waited till the last possible moment to prepare for this test.


PPPOYPDNCAEOM !!!!

 

Sounds like you might have to integrate the equation...possibly multiple times. Once to get velocities, which you multiply to mass to get the momentum. Once again to get the position? What is "x" in this equation? Position?

 

holy tachyons batman!
I took engineering physics and don't remember some of these problems.

5) isn't there a table you can look up that energy? calculating wavelength is easy once you have that quanta.

 

I graduated with a degree in Physics, but my job is pretty unrelated to actual physics. Looking at this stuff brings back memories, but unfortunately I don't remember any of it

 

wolfram|alpha should be in your bookmarks pronto...

http://www.wolframalpha.com/

 

what?

 

Just tell your teacher that you won't remember it in a few years so why bother in the first place...