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

(b) .3 DeBroglie Wavelengths. Using h=6.63X10^(-34)kg-m² /s, calculate three deBroglie wavelengths: 1. Your own. Use your own mass in kilograms, and your fastest speed (estimate this, if you haven't measured it). (.1) 2. The deBroglie wavelength of an electron e with the following values of mass and velocity, m_e=10^(-30)kg, v_e=10^7m/s. (.1) 3. The deBroglie wavelength of a neutron n with m_n=10^-27kg, v_n=10^4m/s. (.1) You must show your work and have the right answer to get credit.

33. one point, from Lectures 33 and 34, many short answer, with some symbols

(a) .2 Neutron Diffraction (Nobel Prize 1994). The 1994 Nobel Prize in Physics was given for neutron diffraction research. Why would physicists use neutron instead of light (.1) or electron waves (.1) to probe the structure of matter?

(b) .2 Schrödinger's Psi. Define Psi (vecx,t) (.1) and |Psi (vecx,t)|^2 (.1). Here vec means vector.

(c) .2 Quantum Duality. Illustrate the meaning of ``wave-particle duality'' by saying what it has to do with light (.1) and the electron (.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 30, 1997.