Relativity, Spacetime, and Contemporary Physics

PHYS 130, Fall 2025

Course Web Page

Brooks Thomas

Hugel 020
Physics Department
Lafayette College
730 High St.
Easton, PA 18042

Phone: (610) 330-5207
Email: thomasbd@lafayette.edu

Contact Info

Physics at Lafayette

Other Resources

• My Personal Home Page
• Lafayette Physics Department
• Physics Courses

• List of NSF REU Sites
• APS Resources for Students
• Society of Physics Students (SPS)
• CUWiP
• SACNAS
• National Society of Black Physicists

Course Materials and Other Useful Links

• Syllabus
• Resources and Demos Page
• Course Moodle

Textbooks

• Thomas A. Moore, Six Ideas That Shaped Physics: Unit R — Laws of Physics are Frame-Independent, 4th Ed. (McGraw-Hill, 2022).

Instructor Drop-In Hours

My instructor drop-in hours this semester will be held in Hugel 125. (These are sometimes referred to as "office hours," but in this case that's a misnomer in this case because Hugel 125 is not my office.) These drop-in hours are listed below:


• Wed., 12:00 noon - 1:00 PM
• Thurs., 11:00 AM - 12:00 noon
• Fri., 9:00 - 10:00 AM

The default assumption is that my drop-in hours will take place in person. However, if the need arises for you to attend my drop-in hours virtually at any point during the semester (e.g., because of a winter-weather emergency or an illness), please email me in advance to schedule a virtual drop-in-hours meeting.

Course Schedule

This schedule includes both lecture and laboratory components of the course. The sources referred to in the "Readings Covered" column are abbreviated as follows:


• "Moore C": Thomas A. Moore, Six Ideas That Shaped Physics: Unit C — Conservation Laws Constrain Interactions, 2nd Ed.
• "Moore R": Thomas A. Moore, Six Ideas That Shaped Physics: Unit R — Laws of Physics are Frame-Independent, 4th Ed.
• "Griffiths P": David J. Griffiths, Introduction to Elementary Particles,, 2nd Ed.
• "Griffiths R": David J. Griffiths, Revolutions in Twentieth-Century Physics.
• "Krane": "Kenneth Krane, Modern Physics, 3rd Ed.
• "Taylor": Edwin F. Taylor and John. A. Wheeler, Exploring Black Holes: Introduction to General Relativity.



Date	Topic	Reading Covered	Homework
Week 1
8/25	Introduction and Overview	Moore C, Ch. 1
8/27	Vectors and Velocity	Moore C, Ch. 2
8/28	Phys 130 Lab: Introductory Meeting (1:15 - 4:00 PM in Hugel 042)
8/29	Coordinate Transformations	Moore C, Ch. 3	HW 1 Due
Week 2
9/1	Monentum	Moore C, Ch. 4
9/3	Interactions and Collisions	Moore C, Ch. 5
9/4	Phys 130 Lab: Speed of Light: Foucault's Method (1:15 - 4:00 PM in Hugel 042)
9/5	Energy	Moore C, Ch. 6	HW 2 Due
Week 3
9/8	The Speed of Light	Moore R, Ch. 1.1 - 1.6
9/10	Spacetimes Diagrams and SR Units	Moore R, Ch. 2.1 - 2.3
9/11	Phys 130 Lab: Speed of Light: Fiber-Optic Method (1:15 - 4:00 PM in Hugel 042)
9/12	Worldlines and Spacetime Diagrams	Moore R, Ch. 2.4 - 2.7	HW 3 Due
Week 4
9/15	Time and The Metric Equation	Moore R, Ch. 3.1 - 3.3
9/17	The Geometry of Spacetime	Moore R, Ch. 3.4 - 3.7
9/18	Phys 130 Lab: Lifetime of the Muon, Part I (1:15 - 4:00 PM in Hugel 042)
9/19	Gravitational Waves (Brooks in Canada)		HW 4 Due
Week 5
9/22	Time Dilation (Brooks in Canada)	Moore R, Ch. 4.1 - 4.6
9/24	Coordinate Transformations	Moore R, Ch. 5.1 - 5.4
9/25	Mid-Term Exam I (During Lab Period, from 1:15 - 3:00 PM in Hugel 042)
9/26	The Lorentz Transformation	Moore R, Ch. 5.5 - 5.6
Week 6
9/29	Relativistic Invariants
10/1	Length Contraction	Moore R, 6.1 - 6.4
10/2	Phys 130 Lab: Lifetime of the Muon, Part II (1:15 - 4:00 PM in Hugel 042)
10/3	The Pole/Barn Paradox	Moore R, Ch. 6.5 - 6.6	HW 5 Due
Week 7
10/6	Causality	Moore R, Ch. 7.1 - 7.3
10/8	The Velocity Transform	Moore R, Ch. 7.4
10/9	Phys 130 Lab: Absolute Zero (1:15 - 4:00 PM in Hugel 042)
10/10	Four-Momentum	Moore R, Ch. 8.1 - 8.3	HW 6 Due
Week 8
10/13	Fall Break (No Class Meeting)
10/15	Brooks in Brazil (No Class Meeting)
10/16	Fall Break Week (No Lab Meeting)
10/17	Brooks in Brazil (No Class Meeting)
Week 9
10/20	Four-Momentum Conservation	Moore R, Ch. 8.4 - 8.6
10/22	Photons and Other Massless Particles	Moore R, Ch. 9.4
10/23	Phys 130 Lab: Michelson Interferometer (1:15 - 4:00 PM in Hugel 042)
10/24	Relativistic Collisions	Moore R, Ch. 9.1 - 9.3, 9.5 - 9.6	HW 7 Due
Week 10
10/27	General Relativity and the Equivalence Principle
10/29	The Geometry of Curved Spacetime	Taylor, p. 2-17 - 2-24
10/30	Black Holes (During First 50 Minutes of Lab Period) 1:15 - 2:05 PM in Hugel 142	Taylor, p. 2-24 - 2-41
10/30	Mid-Term Exam II (During Lab Period, from 2:15 - 4:00 PM in Hugel 042)
10/31	Brooks in Colorado Springs (No Class Meeting)
Week 11
11/3	The Atom and its Nucleus	Krane: Ch. 12.1 - 12.4
11/5	Nuclear Decay	Krane: Ch. 12.6 - 12.9
11/6	The Basic Building Blocks of Nature (During First 50 Minutes of Lab Period) 1:15 - 2:05 PM in Hugel 142	Griffiths P, Ch. 1.1 - 1.4
11/6	Phys 130 Lab: Polarization (2:15 - 4:00 PM in Hugel 042)
11/7	The Four Fundamental Forces	Griffiths P, Ch. 2.1	HW 8 Due
Week 12
11/10	Campus-Wide Power Outage (No Class Meeting)
11/12	Matter: Quarks and Leptons	Griffiths P, Ch. 1.6 - 1.9
11/13	Phys 130 Lab: Charge-to-Mass Ratio of the Electron (1:15 - 4:00 PM in Hugel 042)
11/14	Feynman Diagrams and Interactions	Griffiths P, Ch. 2.2	HW 9 Due
Week 13
11/17	Hadrons and the Strong Force	Griffiths P, 2.3
11/19	The Weak Force	Griffiths P, Ch. 1.10, 2.4
11/20	Phys 130 Lab: Spectroscopy (1:15 - 4:00 PM in Hugel 042)
11/21	Neutrinos	Griffiths P, Ch. 1.5	HW 10 Due
Week 14
11/24	The Higgs Mechanism
11/26	Thanksgiving Break (No Class Meeting)
11/27	Thanksgiving Break (No Lab Meeting)
11/28	Thanksgiving Break (No Class Meeting)
Week 15
12/1	Colliders and Detectors
12/3	Redshift and Cosmic Expansion	Griffiths R, Ch. 5.1
12/4	Phys 130 Lab: Quantum Dots (1:10 - 4:00 PM in Hugel 042)
12/5	Dark Matter		HW 11 Due
Final Exam
12/9	Final Exam: 12:00 noon - 3:00 PM in Hugel 225