# The uncertainty principle and classical analogs

## Lecture Playlist

10. #### The uncertainty principle and classical analogs

March 19, 2012

Professor Susskind begins the final lecture of the course by deriving the uncertainty principle from the triangle inequity.  He then shows the correspondence between the motion of wave packets and the classical equations of motion.  The expectation value of position for the center of a wave packet follows the classical equations.  Heavy particles have wave packets which do not spread out over time.

Topics:
• Derivation of the uncertainty principle
• Using the Schrödinger equation to derive the classical equations of motion for a wave packet
• Wave packets
• Under what conditions does a wave packet remain localized?
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