There are lots of absences for various reasons. Here are some online resources.
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.
diverging lenses: More of lesson 5 here: http://www.physicsclassroom.com/class/refrn and the interactive
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
Videos about them here.
https://www.youtube.com/watch?v=K74m_A3L0xM
https://www.youtube.com/watch?v=Dy2m45CQs5E
The photoelectric effect, Compton x-ray scattering: Online possibilities: http://www.youtube.com/watch?v=4uBekxM4vEc
