Video Library

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. 

  

 

Tuesday Aug 12, 2008
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Symmetry principles in physics are a very powerful guiding principle. Sometimes they are so powerful that they can determine a theory completely. This talk will be a tour from the Standard Model of particle physics to string theory compactifications using mostly symmetry arguments.

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Tuesday Aug 12, 2008
Speaker(s): 

Symmetry principles in physics are a very powerful guiding principle. Sometimes they are so powerful that they can determine a theory completely. This talk will be a tour from the Standard Model of particle physics to string theory compactifications using mostly symmetry arguments.

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Tuesday Aug 12, 2008
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Tuesday Aug 12, 2008
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Taking our intuitive understanding of the quantum world gained by studying a particle in a one-dimensional box, we generalize to understand a quantum harmonic oscillator.

Learning Outcomes:

• Introduction to the classical physics of a ball rolling back and forth in a bowl, a simple example of a very important type of bounded motion called a “harmonic oscillator.”

• The quantization of allowed energies of a harmonic oscillator: even spacing between energy levels, and zero point energy.

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Tuesday Aug 12, 2008
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By applying our understanding of the quantum harmonic oscillator to the electromagnetic field we learn what a photon is, and are introduced to “quantum field theory” and the amazing “Casimir effect.”

Learning Outcomes:

• Understanding that classical electromagnetic waves bouncing around inside a mirrored box will exist as standing waves with only certain allowed frequencies.

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Tuesday Aug 12, 2008
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Tuesday Aug 12, 2008
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Space obeys the rules of Euclidean geometry. Spacetime obeys the rules of a new kind of geometry called Minkowskian geometry.

Learning Outcomes:

• Triangles in spacetime obey a Pythagoras-like theorem, but with an unusual minus sign.

• The true nature of time as geometrical distance in spacetime.

• How to analyse and resolve the Twins’ Paradox using spacetime diagrams in combination with Minkowskian geometry.

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Tuesday Aug 12, 2008
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Learning to use Minkowskian geometry to understand, very simply, a variety of aspects of Einstein’s spacetime.
Learning Outcomes:
• How a straight line is the longest path between two points in spacetime.
• How a light particle experiences space and time: its journey from one location in the universe to another involves zero spacetime distance, and is thus instantaneous!
• How Einstein’s special relativity has no difficulty handling accelerated observers.

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Tuesday Aug 12, 2008
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A discussion of how to synchronize clocks that are separated in space, and how this leads to the relativity of simultaneity.

Learning Outcomes:

• Understanding that clock synchronization is a physical process, and exploring various methods of synchronization using spacetime diagrams.

• How to measure distance with a clock: the concept of radar ranging distance.

• A profound realization about the nature of spacetime: Events that are simultaneous for one observer might not be simultaneous for another.

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