Please make sure you play the Video before clicking the links below.
- Lecture 1 Review
Quick review of material from first lecture. Definitions of two postulates of special relativity.
- Addition of Velocities I
Galilean addition of velocities, with equation. Relativity of speed for a train and rider system.
- Addition of Velocities II
Relativistic addition of velocities, with equation. Misuse of relativistic addition to "show" that 1+1<2.
Explanation of relativity of simultaneity. Thought experiment of a rider with a flashlight on a moving train.
- Time Dilation
Explanation of relativity of time intervals. Definition of time dilation, with equation. Behavior of moving clocks. Derivation of equation for time dilation. Empirical confirmation of time dilation using the half-life of fast-moving particles.
- Length Contraction
Explanation of relativity of length. Definition of length contraction, with equation. Length of rod traveling at 60% of the speed of light.
- Time and Space
Contradiction of relativity and Newtonian mechanics. Amusing quotations relating to time and space. What is time? 'Twin paradox' presented.