Optics Problems
Find out how the index of refraction is related to the optical density of materials, angle of incidence, and the speed of light. 
Phases of the Moon I
Have you looked up at the Moon and wondered what causes the Moon’s phases? We all know that the Moon’s appearance seems to change over the course of a Month, but why?
Plane Mirrors
This question set explores the law of reflection in situations involving plane mirrors.
Phases of the Moon: Part II
Have you looked up at the Moon and wondered what causes the Moon’s phases? We all know that the Moon’s appearance seems to change over the course of a Month, but why? This is part 2 in the series of question sets.
Lenses
This set of conceptual questions are designed for students after they have just learnt about lenses. It is designed to make sure they understand how ray diagrams work and the properties of lenses.