Since 2002 Perimeter Institute has been recording seminars, conference talks, and public outreach events using video cameras installed in our lecture theatres. Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities. Recordings of events in these areas are all available On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA). PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's arXiv.org.
Repeating the experiment from SR-3 using light rather than sound, and understanding what Einstein assumed regarding the speed of light.
• How to draw a spacetime diagram that represents the sending and receiving of a light signal.
• Understanding that Einstein's Speed of Light Principle: "For an observer at rest, the speed of light is c, independent of the motion of the source" is natural and easy to believe.
Einstein"s Relativity Principle applies to both mechanical and electromagnetic phenomena.
Deriving the Doppler shift for light, from which all of special relativity follows.
• Return to the thought experiment in SR-3. By replacing Newton’s assumption of Universal Time with Einstein’s Relativity Principle we arrive at the Doppler shift for light.
• How the Doppler shift for light provides us with important clues about the nature of time as experienced by moving observers.
• Understanding relativistic time dilation in terms of the geometry of spacetime.
A demonstration of electron superposition using an electron diffraction apparatus, plus an introduction to quantum entanglement.
• Concrete demonstration related to the surprising 360/720 degree prediction discussed in QM-15.
• Understanding how an electron diffraction apparatus works, and how its surprising experimental results are explained by electron superposition, i.e. the electron behaving as if it can exist in multiple paths simultaneously.
Quantum teleportation as a fascinating application of quantum entanglement.
• Understanding precisely what “teleportation” could mean in our quantum universe.
• How quantum entanglement is the key to making quantum teleportation possible.
• How a quantum teleportation machine functions.
Development of a successful mathematical model of spin.
• A review of the mathematics of vectors.
• Applying the experimental results of QM-14 to construct a mathematical model of an electron spinning in any direction as a certain superposition of the spin up and spin down states.
A discussion of the surprising results of the single slit and double slit experiments.
• How the single slit experiment suggests that chance is at the heart of nature, and that the behaviour of particles might need to be described by something different from Newton’s laws.
• How the double slit experiment suggests that understanding the behaviour of particles will require a radically new way of thinking about how nature works at a fundamental level.
Making the connection between particle probability patterns and wave intensity patterns, leading to the famous de Broglie relationship.
• Repeating the single slit experiment with waves instead of particles. Seeing that the particle probability pattern is the same as the wave intensity pattern.
• Same as above, but for the double slit experiment.
• Putting it all together to derive the de Broglie relationship between the momentum of a particle and the wavelength of a corresponding wave.
Using the de Broglie relation as a foundation for understanding the quirky quantum behaviour of particles.
• Understanding how a particle in one-dimensional box behaves like a superposition of left- and right-moving de Broglie waves, implying that the particle is moving both left and right simultaneously.
• Understanding the relationship between the intensity of de Broglie waves and the probability of finding the particle at specific locations inside the box.