These descriptions are labeled by the dates that periods 2,3 and 4 will cover this material. Period 6 always hits it the next day.
Wed 3/9 - Converging lens activity and notes on principle rays and ray diagrams
Something similar online : Most of lesson 5 here http://www.physicsclassroom.com/class/refrn Also the interactive that is linked to throughout the lessons will be good.
Friday 3/11 - More practice with converging lenses, ray diagrams, and the lensmaker's equation. Also introduce diverging lenses.
Something similar online: More of lesson 5 here: http://www.physicsclassroom.com/class/refrn and the interactive
Tuesday 3/13 (ACT day) - More details about the wave model - interference, the 2 slit experiment, and the electro magnetic spectrum
Something similar online: http://www.physicsclassroom.com/class/light lessons 1 a,b,c 2a and 3a
Thursday 3/15 - Review, the photoelectric effect, Compton x-ray scattering
Online possibilities: http://www.youtube.com/watch?v=4uBekxM4vEc