PHY100S - The Magic of Physics - Class 19 - Monday March 20, 2006

Announcements

• Pre-Class Quiz #9 is in two weeks: Monday April 3 at the beginning of class. It will be on Chapter 18, and is the last Pre-Class Quiz of the term.
• Homework #9 is Hobson Conceptual Exercises Chapter 14: 5, 6, 14, 28. It is due by 5 PM Monday March 27 in the Drop Box for your tutor.

Pre-Class Quiz #8

The link to the right accesses a pdf of the questions and answers for today's quiz.

Today's Class

If we wish to learn a bit more about atomic spectra, which the text discusses in §14.1, a few more facts appear in a small document that I wrote a while ago. The link to the right accesses that document.
The text discusses standing waves in §14.2. You may learn more about these via the links to the right.	html pdf
The text also discusses the development of a model of the atom in §14.2. You may learn more about this via the link to the right.
In our discussion of electrons quantum jumping in the Hydrogen atom, we showed this Flash animation.

In our discussion of standing waves we showed the following animated gifs:

A standing wave around a circle. The wavelength is 1/3 of the length of the circumference	A standing wave around a circle. The wavelength is 1/4 of the length of the circumference
One of the standing waves on a circular drum head.

Here is today's Journal.