1. In class we started outlining the major success of Thomson's plum
pudding model. We took the furthest electron from the center of the
atom/pudding and let it travel in a circular path according to the
electronic force between that electron and the rest of the atom.
Remember, the rest of the atom has a total charge of +e. This
gave us an equation between v, the circular speed of the electron,
and r, the radius of its circular trajectory. Now, derive
another relation between v and r based on the wavelength
of the light emitted due to the electron's motion. Use this relation
to eliminate v from the first equation. Then, put limits
on r based on the fact that atoms emit visible light.
2. Problem 3.43
3. Problem 1-9 of this