Once again, I'm adjusting the schedule. I think our brief discussion on dielectrics last time is enough to get us by for a while, so we will spend most of the first part of class tomorrow just going over problems - particularly, the last homework set - in preparation for Friday's exam.
What this basically means is that we'll skip most of Ch. 4 for now, and move on to circuits next week. The things we really need from Ch. 4 to move forward is what we covered on Monday - roughly how dielectrics work microscopically, and the effect they have on electrostatic energy. After we have finished circuits, we'll touch back on dielectrics a bit again before moving on to magnetic forces & fields.
For the lab tomorrow, we'll learn how to use LEDs and photodetectors to make an opto-isolator, or from another viewpoint, the basic guts of a remote control. This will also illustrate some neat aspects of signal modulation, and lead us into amplifiers, triggers, and comparators next week.
If you don't know what most of those things are, we'll make an LED flash and pick it up from across the room on the scope, without any wires ;-)
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