What is the speed of light in a vacuum?
What is the electromagnetic spectrum (in order of increasing frequency)?
What is the law of reflection?
What is refraction?
What is Snell's Law?
What causes a rainbow?
Hint: A beautiful example of the orderly laws of optics in the natural world
What is total internal reflection?
What is the difference between a converging and diverging lens?
What is the index of refraction?