PHYSICS 432/532: Cosmology Midterm Solution Key (2010)
February 9, 2010
1. [45 points] Lets get all of the distance stu out of the way early. For this problem,
you are to imagine that youre a cosmologist in one of two possible universes.
Universe A is ess
Cosmology HW 1
HW 1
Due January 21, 2014
Please answer all questions clearly and concisely. You are strongly encouraged to discuss the homework with
your classmates, but you must complete the written homework by yourself, and of course, the material you
s
Cosmology HW 4
HW 4
Due Tuesday, February 25, 2014
Please answer all questions clearly and concisely. You are strongly encouraged to discuss the homework with
your classmates, but you must complete the written homework by yourself, and of course, the mate
Cosmology HW 3
HW 3
Due February 11, 2014
Please answer all questions clearly and concisely. You are strongly encouraged to discuss the homework with
your classmates, but you must complete the written homework by yourself, and of course, the material you
PHYSICS 432/532: Cosmology Final Exam Solution Key (2012)
Final Exam Solution Key
1. [25 points] Short Answer (5 points each)
(a) Consider atomic hydrogen in the photosphere of the sun (T = 5800K ). Recalling that:
En =
13.6 eV
n2
What is the approximate
Cosmology Linear Perturbation Theory
1
Linear Perturbation Theory
It is extremely dicult to model the growth of structures like clusters, galaxies, and stars. To
do so, we often rely on numerical simulations. We start with a nearly uniform distribution
of
Cosmology HW 2
HW 2
Due January 30, 2014
Please answer all questions clearly and concisely. You are strongly encouraged to discuss the homework with
your classmates, but you must complete the written homework by yourself, and of course, the material you
s
PHYSICS 432/532: Cosmology Midterm Exam
February 11, 2014, 9:30am
You have until 11:00am to complete this exam. Please answer all questions clearly and completely. Make
sure that you show all of your work. Only answers written in your bluebooks will be gr
PHYSICS 432/532: Cosmology Midterm Exam Solution Key (2012)
Midterm Exam Solution Key
1. [35 points] Id like to begin by comparing a couple of simple universes, just to show that you have the
mechanics down.
Universe A is entirely empty.
Universe B is Ein
PHYSICS 432/532: Cosmology Final Exam Solution Key (2010)
March 18, 2010
1. [30 points] Short Answers
(a) [4 points] In a sentence or two, explain why the primordial abundance of 4 He is
approximately 25%, regardless of parameters like B .
Sol.
This numbe