Student Learning Objectives
Lessons / Lecture Notes
Important Equations
Example Problems
Applets and Animations
Student Learning Objectives
Lessons / Lecture Notes
PY106 Notes from Boston University (algebrabased):
Physics 2C notes from Dr. Bobby W.S. Lau (algebrabased)
HyperPhysics (calculusbased)
Physics 4B notes from Dr. Bobby W.S. Lau (calculusbased)
Important Equations (for algebrabased Physics)
Example Problems
Example Problems for algebrabased physics (from Physics 8th Edition by Cutnell and Johnson):
Example Problems (Special Relativity)
Solutions to Example Problems (Special Relativity)
Applets and Animations
MichelsonMorely Experiment  This movie simulates the setup used in the MichelsonMorley experiment, including the nonexistent aether wind they were trying to detect! The basic idea is to detect the time difference between light going "upstream then downstream" and light going "across shore and back." Rotating the apparatus exchanges these two routes: you can rotate it by touch, or with a mouse. 

MichelsonMorley Experiment  This applet shows the setup for the MichelsonMorley Experiment. There are no directions so it is a bit challenging to use this applet.  
Light Clock  Time Dilation 
Understanding why moving clocks run slow. A major consequence of this apparent paradox is that time flows at different rates in the two frames: a moving clock is observed to run slow. Here's a primitive clock: a blob of light bouncing back and forth between two fixed mirrors. If the clock is moving relative to us, the light must go further  but its speed must be the same, from the theory, so it runs slow. The reality of this effect is well illustrated by the GPS, which depends on very accurate clocks in moving satellites. The system yields seriously incorrect results if the relativistic clock slowing is ignored. 

An Example of Time Dilation 
A spaceship is flying a distance of 5 light hours, for example from Earth to the dwarf planet Pluto. The speed can be regulated with the upper buttons. The app demonstrates that the clock in the spaceship goes more slowly than the two clocks of the system in which Earth and Pluto are motionless. 

Time Dilation 
This applet shows time dilation for different speeds. There are no directions so it is a bit challenging to use this applet. 

Length Contraction  This applet shows length contraction for different speeds. There are no directions so it is a bit challenging to use this applet. 