31. one point, from Lectures 31 and 32, short answers and one energy diagram which takes time

(d) .3 Action A. What is action A in classical physics (.1), how is it related to Planck's constant h (.1), and how did it enter Bohr's theory of the hydrogen atom? (.1)

32. one point, from Lectures 32 and 33, tall and time-consuming energy diagram and short calculations

(a) .7 Hydrogen Energy Diagram. Draw ACCURATELY the energy diagram for the hydrogen atom, allowing lots of space to label almost everything: the axes and numbers of the energy levels (.1); the values of the energy levels for n=1, 2, 3, 4, 5 (.1); the values of the energy given off as photons when the atom makes a transition from the 1st through 4th excited states to the ground state (.1); and the photon energies E_(5->2), E_(4->2), and E_(3->2) of the three colors we saw as the Balmer series (.1). Say which transition corresponds to which color in the Balmer spectrum (.1). Indicate on your diagram the energy of the photon required to set a ground-state electron free (.1). What type of photon is it (infrared, visible, ultraviolet) (.1)?

HW3A is over Lectures 29 through 34, which is Wed Nov 19. Stay up to date on lectures early in Unit 3! Thursday, November 27, is Thanksgiving.

Revised November 9, 1997.