PH103         PRINCIPLES OF PHYSICS III         SPRING 2011

Exam #2 will be Wednesday, April 27, during class period. You may use a 3"X5" card of notes, a calculator. The exam will contain any masses you may need, and some conversion factors.

The test will contain 10 multiple-choice questions (which will receive no partial credit and will require no justification), and 4 long-answer questions involving calculation, description, and/or explanation.  The long answer questions do require justification -- answer them as if you wanted to show a fellow student how to do that problem or understand that concept.  For computation questions, show equations, numbers plugged in, and answer.  Be sure your final answer is clear on all questions.

Make sure you are able to do all the types of things you were asked to do for this class, as in preflights, homework, PAL's, and Quizdom.

Some topics to review for exam #2 (may not be all-inclusive):

• Classical relativity
• position, velocity, and time
• good only at low speed
• Inertial reference frames -- by definition and in practical use
• Einstein's postulates and relativity
• time dilation, proper time
• simultaneity
• length contraction
• velocity transformation
• mass, energy
• quantization
• charge (electrons)
• light (photons)
• photons
• energy
• momentum
• Wave-particle-duality
• Evidence for wave nature of light
• diffraction, interference, etc
• Evidence for particle (photon) nature of light
• freq of emitted light as function of temp
• peak wavelength
• how photon theory explains what wave theory can't
• Compton scattering
•  photon scatters or reflects as single photons colliding with single electrons
• note: you will not need to calculate wavelength change
• photoelectric effect
• KE (or V) vs frequency
• work function
• cutoff frequency, cutoff wavelength
• how photon theory explains what wave theory can't
• wave-particle duality
• for light and matter
• eqns for light and eqns for matter
• if wavelength << sizes of obstacles and openings don't see wave nature
• if wavelength >> sizes of obstacles and openings don't see particle nature
• propagates as wave, interacts as particle
• wavefunction
• probability interpretation
• matter wave not electromagnetic wave
• Debroglie wavelength
• Diffraction and interference of matter
• uncertainty
• meaning of uncertainty in position and momentum