Having trouble finding some of the defintions in book

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In summary, the conversation covers various topics and definitions including the Lorentz contraction equation, the selection rules for dipole radiation, the energies of electrons in hydrogen, quantum numbers for hydrogen, equations relating to parent-daughter nuclei in alpha and beta decay, the relationship between halflife and disintegration constant, the size of a nucleus, energy bands in solids, the number of states in s-band and p-band, the energy of a harmonic oscillator, and the energies of a particle in a 1-D box. The conversation also mentions using other resources, such as Google, to find more information.
  • #1
lotrsimp12345
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define the following
are these definitions correct?
and i can't find some of them in the book

1. Lorentz contraction equation
x'=x-vt

2. the selection rules for dipole radiation
?

3.the energies of the electron in hydrogen


4. 4 quantum numbers for hydrogen


5. the equation relating the parent-daughter nuclei in alpha decay



6. the equation relating the parent-daughter nuclei in beta decay


7. the relationship between halflife and the disintegration constant



8. how big is a nuclues?





9. what is the reason for energy bands in solids?





10. how many states are there in a s-band?




11. how many states are there in a p-band?






12. the energy of a harmonic oscillator

E=hv(n+1/2)


13. the energies of a particle in a 1-D box of length, L





14. define phase velocity






15.define group velocity





help would be appreciated, I know how to apply them. Thanks
 
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  • #2
answer to #4 would be n=2, l=0 ml=0 and ms=+-1/2
 
  • #3
and i can't find some of them in the book

Try other books. You should also get lots of information just using Google. See what you can find.

I know how to apply them.

You know how to apply them, but you don't know what they are? I'm not sure I understand what you mean.
 
  • #4
what exactly is an energy band. I am really confused.
From my reading i get that each s-band can only have one state correct?
and the p-band would be able to have 2 states?
 
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