In this section, many of the ideas about quantum mechanics that we have covered in the sections 16-17 are discussed. In the space below, write down at least two things you learned from these topics.

* Photons, Energy Levels and the Bohr Model of the Atom * Wave-particle Duality and the Double-Slit Experiment * Probability Waves

Also, in the space below that, write down at least two questions that you have about the topics in the video (i.e. things you don't understand and/or want to know more about).