2130 HW 1
Due: Fri 1/24 noon. Turn it by putting it in the box labeled 2130 at the entrance to the helproom
(G2B90).
1. A big cannon shoots cannonballs the size
Physics 2130, HW 11
Due Mon. Apr. 21
1) An electron has a total energy as shown by the blue dashed line and a potential energy curve as shown by the
red line.
a) In which regions (1-8), would you expe
Phys. 2130 HW02
Due: Friday 1/31 noon. Turn it by putting it in the box labeled 2130 at the entrance to
the helproom (G2B90).
1. (5pts. For both correct answers, oth
Due Wed. Oct. 12, 2016
Homework Assignment 7 Solutions
Due Wednesday Oct. 12, 2016, 5PM
Problem 1) (5 pts) Select one long answer problem from HWK 5, for which you had the
wrong answer. Then:
i) ident
Announcements
Todays class
Reading for Wednesday: finish chapter 1,
(1.14).
A little more on evidence
for time dilation.
Length contraction
Lorentz transformation
HW3 assigned today due Wednesday
Today: Review of SR
Exam1: Tomorrow, 7:30-9:00pm, DUANE G1B20
IN THIS ROOM! (unless I emailed you
otherwise)
You can bring 1 paper (Letter format) written on one
side with whatever you think might hel
Announcements
Reading for Review chapters 1 and 2
A proton (mass 1.6e-27 kg) is travelling at 0.99 c. How
much Kinetic energy does it have?
HW 4 Due Wed. noon. Some of the topics on
this will be on
Announcements
Proper time.
An object is moving past you with a relative velocity
u=0.8c (as measured by you). When your watch shows
1 second has elapsed how much time does a clock held
by an observer
Todays class
Announcements
Length contraction
Lorentz transformation
Doppler shift
Reading for Monday: 2.1 - 2.5
HW 3 is posted. Due next Wed. noon.
The Lorentz transformation
Lorentz transformat
Phys 2130, HW 10 Due Fri Apr. 11
1. 5 pts. What is the smallest possible energy (in femto-eV (10-15) the ground state for an electron
in a 0.001 m (1 mm) wire? You may assume the wire acts as an infin
Phys. 2130 HW03
Due: Friday 2/7 noon. Turn it by putting it in the box labeled 2130 at the entrance to
the helproom (G2B90).
1.
2.
3.
4.
TZD 1.25 (a) 5 pts, (b) 5
PHYS 2130, HW6. Due date: Fri, Feb. 28 at noon in G2B90.
1. You illuminate a metal plate with light, which has the wavelength of 300nm. The ejected
photoelectrons have
Phys 2130 HW 8 Due Fri Mar. 21
1. (5 points) Describe the limitations of the Bohr model. Which of these limitations does
the deBroglie wave model address and why?
2. (5 points) Suppose you have an ele
Phys. 2130 HW04
Problems 1-4 are relevant for the exam. They are due: Wed. 2/12 noon. Turn it by putting it in the
box labeled 2130 at the entrance to the helproom
Phys 2130 HW 9 Due Fri. Apr. 4
1.a. 5 pts. Weve been using a bunch of new terms and symbols, including:
1.
2.
3.
4.
5.
,
|2,
*,
the wave function, and
the probability density.
Explain the relationship
Announcements:
Reading for Friday: 6.1 6.3 Exam 2 is next week (Tue. March 9th, 7:309:15pm). Topics: TZD, Chapters 1-5, 11.9, 11.10 11.10 Office hours: Today 1 3pm
Today: LASERs!
Q1
Whats so special a
Announcements:
Reading for Wednesday: 11.9 & 11.10 Exam 2 is next week (Tue. March 9th, 7:309:15pm) Topics: TZD, Chapters 1-5, 11.9, 11.10 Practice exam is posted on CUlearn. (Disclaimer: The exam nex
An single electron bashes into an atom in a discharge lamp
- 10 V + -2 eV -3 eV -6 eV -10eV If atom fixed at this point in tube, list all the possible photon energies (colors) that you might see? A. 1
Today (and next class):
Announcements
Light is a wave! Or is it? (also some E&M refresher)
Reading for Monday: 4.3 4.4
HW5 Assigned Wednesday.
Participation scores up today
Still updating CULearn.
Electromagnetic waves carry energy
Emax
Electromagnetic waves carry energy
Emax=peak amplitude
X #1
c
Emax
X
X #2
E1max=E2max>E3max
f1 = f3 < f2
X #3
Which barrel will heat up the fastest?
a. 2>1>3
b.
Due Wed. Sept. 14, 2016
Homework Assignment 3 Solutions
The problems this week cover topics in time dilation, length contraction, and Lorentz
Transformations. Each TZ&D problem is worth 10 points. The
Physics 2130 NAME: go /
Student ID #
Exam 1: one 8.5x11" cheat sheet, and calculator.
Test time: 60 minutes
EXAM VERSION: A
Please do not open the exam until asked to do so.
0 Your exam should have
Due Wed. Sept. 28, 2016
Homework Assignment 5 Solutions
We are beginning to move from Special Relativity towards quantum mechanics. In this
problem set we consider some of the implications of mass and
Due Wed. Oct. 5, 2016
Homework Assignment 6 Solutions
This problem set is about electromagnetic waves, about complex numbers and functions
of complex numbers, and about the photoelectric effect, where
Due Wed. Sept. 21, 2016
Homework Assignment 4 Solutions
This assignment concentrates on the Lorentz transformations and the new definitions of
momentum and energy, definitions that are chosen to match
Due Wed. Aug. 31, 2016
Homework Assignment 1 Solutions
Each Problem will be worth 10 points for a total problem set of 50 points.
Problem 1.
TZ&D 1.6
Most of you understood the idea of the two differe
Due Wed. Oct. 26, 2016
Homework Assignment 9
Due Wednesday Oct. 26, 2016, 5PM
Problem 1) (5 pts) You know the routine! Select one of the problems from HWK 7 that
you either got wrong, or which really
Due Wed. Oct. 19, 2016
Homework Assignment 8
Due Wednesday Oct. 19, 2016, 5PM
Problem 1) (5 pts) Select one of the Lectures from Week 7, and find an in-class question
that you either got wrong, or whi
HWK 2 Solutions
Due Wed. Sept. 7, 2016
Homework Assignment 2 Solutions
This problem set is mostly about how the time between events can be measured to be
different in different inertial frames. We ref
Announcements
You just woke up inside a boat with no windows.
The boat is on the surface of a perfectly still lake.
How can you determine if the boat is moving at a
constant speed or if it is standing