Gaitskell PH0008 Quantum Mechanics and Special Relativity Lecture 8 (Special Relativity) Relativistic Kinematics Velocities in Relativistic Frames & Doppler Effect Prof Rick Gaitskell Department of Physics Brown University Main source at Brown Course Publisher background material may also be available at http://gaitskell.brown.edu
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Gaitskell
PH0008Quantum Mechanics and Special Relativity
Lecture 8 (Special Relativity)
Relativistic Kinematics
Velocities in Relativistic Frames& Doppler Effect
Prof Rick Gaitskell
Department of PhysicsBrown University
Main source at Brown Course Publisher
background material may also be available at http://gaitskell.brown.edu
PH0008 Gaitskell Class Spring2002 Rick Gaitskell
Section: Special Relativity Week 4
• Homework (due for M 3/11)• Please hand in now
• Reading (Prepare for 3/11)
o SpecRel (also by French)• Ch5 RelativisticKinematics
• Lecture 8 (M 3/11)o Relativistic Kinematics
• Velocities
• Doppler Effect
• Lecture 6 (W 3/13)o General Relativity
• Guest Lecture from Prof Ian Dell’Antonio
• Lecture 7 (F 3/15)• Doppler Effect• Reanalysis of Twin Paradox with signal
exchange
• Introdution to Relativistic Dynamics
• Reading (Prepare for 3/18)
o SpecRel (also by French)• Ch6 Relativistic Dynamics: Collisions and
Conservation Laws
• (Review)
• Ch3 Einstein & Lorentz Transforms• Ch4 Realtivity: Measurement of Length
and Time Inetrvals
• Ch5 RelativisticKinematics
• Homework #8 (M 3/18)o Start early!
(see web “Assignments”)
PH0008 Gaitskell Class Spring2002 Rick Gaitskell
Homework / Office Hours
• Homework - please hand in
• Please pick up your HW #1-3 from outside my office B&H 516
• I will not be available on Tuesday or Thursday this weeko I will hold special office hours on Friday 1-3 pm
o
PH0008 Gaitskell Class Spring2002 Rick Gaitskell
Question SectionQuestion Section
PH0008 Gaitskell Class Spring2002 Rick Gaitskell
Question SpecRel L08-Q1
•New problem: Clock coming directly towards us atnear light speed?
o(1) The clock appears to be running slow
o(2) The clock appears to be running fast
o(3) Not enough information to judge above
PH0008 Gaitskell Class Spring2002 Rick Gaitskell
Twin ParadoxTwin Paradox•Discuss
PH0008 Gaitskell Class Spring2002 Rick Gaitskell
Twin Paradox
The phenomena of electrodynamics as well as ofmechanics possess no properties corresponding tothe idea of absolute rest. They suggest rather that… the same laws of electrodynamics and optics willbe valid for all frames of reference for which theequations of mechanics hold good.
Einstein, quoted in Physics, Structure and Meaning, p288 Leon Cooper
• First Lawo Body continues at rest, or in uniform motion …
• During acceleration and deceleration this frame is not inertialo We will return to this problem at end of Relativistic Kinematics Section