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. 

  

 

Wednesday Aug 13, 2008
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Understanding the zero point energy of the quantum harmonic oscillator as a consequence of the Heisenberg Uncertainty Principle.

Learning Outcomes:

• Understanding why the minimum energy of a ball in a bowl must be greater than zero based on the Heisenberg Uncertainty Principle.

• How the Heisenberg Uncertainty Principle adds a purely quantum mechanical kinetic energy to the ball, in addition to its classical potential energy.

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Wednesday Aug 13, 2008
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Wednesday Aug 13, 2008
Speaker(s): 

A discussion of the space and time axes of a moving observer and an introduction to length contraction.

Learning Outcomes:

• Understanding why and by how much a moving observer’s position axis is “tilted in time.”

• Understanding how a moving platform appears to a stationary observer.

• Beginning to understand the cause of length contraction.

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Wednesday Aug 13, 2008
Speaker(s): 

A continuation of the SR-10 discussion on length contraction. Resolving Principle 2*.
Learning Outcomes:
• Relativity of simultaneity revisited – gaining a deeper understanding of what it means.
• A full understanding of the nature of length contraction based on relativity of simultaneity.
• Resolving a key paradox in special relativity: Principle 2*, introduced in SR-4. How it is possible to measure the same speed for the light whether you are running toward or away from a flashlight.

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Tuesday Aug 12, 2008
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Domains were introduced in computer science in the late 1960\'s by Dana Scott to provide a semantics for the lambda calculus (the lambda calculus is the basic prototype for a functional programming language i.e. ML). The study of domains with measurements was initiated in the speaker\'s thesis: a domain provides a qualitative view of information expressed in part by an \'information order\' and a measurement on a domain expresses a quantitative view of information with respect to the underlying qualitative aspect.

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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.

Collection/Series: 
Scientific Areas: 

 

Tuesday Aug 12, 2008
Speaker(s): 

 

Tuesday Aug 12, 2008
Speaker(s): 

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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