Summary: Astrophysics (Physics 489) Exam 1
Please show all significant steps clearly in all problems.
1. (15) According to the Saha equation,
Ni+1
Ni
=
2kT Zi+1
PeZi
2!mekT
h2
"
#$
%
&'
3/2
e()i /kT
.
In the solar photosphere, the electron pressure Pe is about 15 dyne/cm2
and the temperature is 5770 K. The
ionization energy of hydrogen is 13.6 eV. Calculate the ratio of neutral hydrogen atoms to hydrogen ions in

Source: Allen, Roland E. - Department of Physics and Astronomy, Texas A&M University

Collections: Physics