## Wavelength Problem

$c=\lambda v$

Katie Wong 1E
Posts: 8
Joined: Fri Sep 25, 2015 3:00 am

### Wavelength Problem

1.11 The energy levels of hydrogen like one-electron ions of atomic number Z differ from those of hydrogen by a factor of $Z^{2}$. Predict the wavelength of the 2s->1s transition in He+

Jana Sandhu 3J
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

### Re: Wavelength Problem

So I see that this problem is from the 5th edition book, which doesn't really correspond much to the 6th edition as far as homework problems go. To solve this you would first use Rydberg's equation:

Frequency= Z^2 * R(1/(n initial squared) - 1/(n final squared))

Once you determine the frequency from this operation, plug that value into c=frequency * wavelength to solve for wavelength.