Wednesday, 4-28-10
  • In Class:
    • Rvw Young's Double Slit.
    • Discuss Diffraction Gratings.
    • Do diffraction grating lab. Find d for diffraction gratings.
  • Homework:
    • PS Interference:
      • Ch 14: #30, 31
      • Ch 24: #1, 3, 35, 37



Tuesday, 4-27-10:
  • In Class:
    • Review waves. Waves: reflect; refract; interfere; diffract
    • reflect: theta i = theta r
    • refract: n=c/lamba; n1sina=n2sinb; n=lambda vacuum / lambda medium;
    • Interfere: depends on phase where waves are detected (by your eyes, ears, or some computer-based sensor).
    • Diffract: waves bend around barriers
  • Homework:
    • Be ready for two point source interference.
    • Study two point source sound interference
    • Study two point source light interference.
    • Book: Sound = Ch 14.7; Light = 24.1 - 24.2
    • PS Interference:
      • Ch 14: #30, 31
      • Ch 24: #1, 3, 35, 37
    • We will plot data in a y=mx+b form

Wednesday, 4-21-10:



Tuesday, 4-20-10:
  • In Class:
    • Do Waves slinky lab
    • Discuss:
      • pulse
      • interference (or superposition)
      • constructive & destructive
      • Standing Waves
      • Fundamental Frequency
      • Harmonics & Overtones
      • Speed of a Wave depends on the MEDIUM through which the wave travels.
  • Homework:
    • Read Ch13.7 --> 13.11
      • Note: the material in sections 13.1 & 13.2 we've covered.
        • Recall: Simple Harmonic Motion (SHM) or Simple Harmonic Oscillations (SHO) is when BOTH 1) an object moves about an equilibrium position and 2) the force pushing the object back towards the equilibrium is proportional to the objects displacement from equilibrium. This means the F to push it back to equilibrium gets bigger the farther the object is from equilibrium and smaller as the object approches equilibrium. Think about a bungee cord with our bungee jumping stuff.
      • the material in sections 13.3 - 13.5 is fair game for the ap test.
    • Do Knight Packet #1, 7, 9, 18-20
      • note phase shift f back is simply the starting point of the oscillation. if the phase shift f is 0 (zero) then you start at equilibrium. if the phase shift f is pi, then you start over at pi. it just shifts where your starting amplitude should be.
















Wednesday, 3-5-08
  • In class
    • Lab stuff: oscillating springs, frequency, period, amplitude & phase shift.
  • HW
    • PS 13.1: # 30, 36-41

-Andrew Reiner


Thursday, 3-06-08:
  • In Class:
    • Review sound waves, frequency, interference

Friday, 3-07-08:
  • In Class:
    • Do Speed of Sound Lab
    • Quick:
      • Resonance of music box
      • Resonance within a hoot tube
  • Homework:
    • Ch 13:
      • Section 10: Interference (3/4 page ) - very general. Read
      • Section 11: Reflections (1 page) - very general. Read
    • Ch 14:
      • Section 7: Interference of Sound Waves: Pay attention to Path Differences: Read & Guided Reading Questions
      • Section 8: Standing Waves: Pay attention to nodes, antinodes. Read Notes
      • Section 9: Forced Vibrations & Resonance: Sets up the next section. Read & Notes.
      • Section 10: Standing Waves in Air Columns: Read & Guided Reading Questions. Be comfortable with the ideas behind equations 14.18 & 14.19
    • Ch 24:
      • Section 1: Condition for Interference: Read & Notes
      • Section 2: Young's Double Slit: Read & Notes on Figures. Compare this to example 14.6 on page 474.
    • Note: While this is a lot of stuff, it is really just a couple of things over & over. 13.10, 14.7, 14.8, 14.10, 24.1, 24.2 ALL deal with interference. Try to make some connections.
Monday, 3-10-08:
  • In Class:
    • Discuss Interference due to:
      • different frequencies of:
        • sound
        • light
      • differences in phase due to:
        • reflection
        • path length difference
    • Young's Double Slit Exp (interference due to path length)
    • Thin Film Interference (interference due to path length AND phase shift due to reflection / transmission)
  • Homework:
    • Ch 24: #1,7
    • Find wavelength for 97.1MHz, 88.5MHz, 1130 KHz
Tuesday, 3-11-08:

Wednesday, 3-12-08:
  • In Class:
    • Finish graph for Laser Double Slit lab. Students should follow guidelines of St. Lawrence University lab.
    • Turn in lab.
    • Finish up tuning fork & speed of sound lab. If graph is funky, then address things that may have caused funky data.
    • Clean up lab stuff
  • H.W.:
    • Read up & study up on Thin Films in ch 24.
  • NOTE: Pick up the packets of stuff for spring break. This should include:
    • A packet on mirrors & lenses
    • A packet on Young's Double Slit & Thin Film Interference
    • Two packets of curved mirrors & lenses
    • A packet of Ray Optics questions.
    • I will post the actual homework for spring break Either Sunday or Monday. It will be something like: Review packet stuff on Young's Double Slit & Thin Film Interferenc on Monday; reflection & snell on Tuesday and 2-3 probs; reflection from spherical mirrors (concave & convex) on Wednesday along with some problems; lenses on Thursday along with some problems; Ray Optics questions and some more mirror / lens questions Friday. The actual problems will be posted Sunday or Monday.


Thursday, 3-13-08:

Friday, 3-14-08:
  • In Class:
    • Partner & Whiteboard *this* ap problem.
  • Homework:
    • A thinking kid would probably review the thin film & Young's Double Slit stuff from the packets.