Biomedical Engineering Reference
In-Depth Information
Fig. 2.3
Energy levels of the hydrogen atom. Vertical lines
represent transitions that the electron can make between
various levels with the associated emitted photon wavelengths
shown.
Example
Calculate the wavelength of the third line in the Balmer series in Fig. 2.1. What is the
photon energy in eV?
Solution
We use Eq. (2.14) with
Z
=
1,
n
f
=
2, and
n
i
=
5:
10
7
1
1
λ
=
1
25
10
6
m
-1
.
1.09737
×
4
-
=
2.30448
×
(2.17)
