Summary and Transparencies for Class 21 - Thursday, April 11, 2002

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A Missed Class Presentation

Nicole Polivka was scheduled to give a class presentation on Entropy on March 28. However, she was ill and I ended up providing some background information on this topic which will be needed for today's class. Nicole has prepared a web site based on what her talk was going to be. You may access it at http://www.angelfire.com/sc3/myentropylesson.html/.


Today's Class

Today, our last class, we talked about Black Hole Thermodynamics. Supplementary Notes exist on this topic: html pdf. We pretty well discussed everything except the material in the Black Holes and Information section.


Epilog

"The principles determining the order in which [condensations and dispersions] follow one another, their mutual influences, now acting directly, now revolving; how when they are exhausted, they revive; and how they come to an end only to begin all over again - these are the properties belonging to things. Words can describe them and knowledge can reach them - but not beyond the extreme limit of the natural world. Those who study the Tao (know that) they cannot follow these changes to the ultimate end, nor search out their first beginnings - this is the place at which discussion has to stop."

-- Chuang Tzu 25.

Ancient form of the "Yin-Yang" symbol