Wednesday, Feb 6, 2008

Collected RA 11.2b
Handed back and went over RA 11.2a
Collected redos for a reduced grade after we went over the worksheet

Wave properties
Reflection - show in mirror, echoes (both light and sound)
Refraction - demonstrate with students walking in a line, show with laser in water (both light and sound)
Diffraction - we can hear around corners (longer wavelength sound) but can't see around corners (shorter wavelength light). The longer the wavelength, the greater the bending around corners. (both light and sound)
Polarization - model with cord and picket fence - only transverse waves can be polarized. Show polarizers, LCD from calculators and some cell phones are polarized. (light only, sound cannot be polarized)

Speed of waves - hand out worksheet - finish for homework due Friday

Venn Diagram exercise with light and sound

Hand out flashcard sheets

Test on waves Tuesday, Feb 12