PHYS 3022
Introduction to Cosmology
Spring 2014
Homework Solutions Week 2
Problem 1
Note: be careful not to make the mistake peak = c/peak . The distribution of black body
radiation (Plancks Law) as a function of frequency has a dierent shape than the dis
PHYS 3022
Introduction to Cosmology
Spring 2014
Homework Solutions Week 3
Problem 1 - Ryden 4.2
For Einsteins static universe: = 4Gm . Assume that at some instant in time some
matter density ( ) is converted into radiation density: m m + r+ .
Since the de
PHYS 3022
Introduction to Cosmology
Spring 2014
Homework Solutions Week 1
Problem 1
There are several ways to approach this problem (equivalent within a factor of 2). You
can use Scharwzschilds equation for the radius of a black hole with the mass of the
Physics 3022: Introduction to
Cosmology
Lecture 2; January 24, 2014
Overview of Todays Lecture
Units
Olbers Paradox
Cosmological Principle
A few more organizational points:
This is a 3rd year physics class, designed more as a survey
course and should be
Physics 3022: Introduction to
Cosmology
Lecture 3; January 29, 2014
Logistics: Homework 1 due this Friday Jan 31 10:10 am
Homework 2 due next Wed Feb 5 10:10 am
Last Class:
Units: use geometrical unit analysis!
Olbers paradox: The sky is dark.
o We do no