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.

30. one point, from Lectures 29 and 30, plus a bit from Unit 2, a group question, short answers

(b) .4 Planck's and Einstein's Insights into Light. How did Planck use h in the explanation of the spectrum of ``blackbody radiation'' (say what that is)? How did Einstein use h in the definition of a photon (say what that is)? (.2 apiece)

(c) .2 Light. What key role did light play in special relativity? (.1) How do we use light to understand atoms? (.1)