HW Assignment #3: Due Thursday March 6th, 2003
The following problems are due 3/6/03. Please write out complete solutions, with all
assumptions and steps written out explicitly, and feel free to email me if you have questions.
1) In the first homework ass

Homework Assignment 2: Due Thursday February 20, 2003
NGC 2639 is an Sa galaxy with a measured maximum rotational velocity of 324 km/s and an
apparent magnitude of B = 12.22 mag.
(a) Estimate its absolute magnitude in the B band from the Tully-Fisher rela

Homework Assignment 4: Due Thursday March 20, 2003
1) Which of the following transitions are allowed transitions in the normal electronic
emission spectrum of an atom: (a) 2s to 1s, (b) 2p to 1s, (c) 3d to 2p, (d) 5d to 2s, (e) 5p
to 3s?
2) Give the elect

Homework Assignment 5: Due Thursday April 10, 2003
1. In class we studied the behavior of the forbidden-line luminosity coming from a
transition corresponding to a 2- level atom, i.e., cases where only the two lowest levels are
populated. In this homework

HW Assignment #1: Due Thursday February 13th , 2003
The following problems are due 2/13/03. At the end of this document are listed the questions you
came up with in the last class. Please review the questions so that we can discuss them in the
next class