The first agenda is to find the focal lengths of two reflecting surfaces (convex and concave) and of two lenses (converging and diverging) in a ray optics kit.[br][br]While it's obviously common to use light sources to find focal lengths, we will rather use lines of sight constructed using pairs of pins placed into a foam board.  Each pair will constitute a light ray.  Two pins can represent an incoming or outgoing ray. You need two rays going in and two going out in order to find a place where they meet. That point is the focal point so long as the incoming "rays" are parallel.[br][br]Q1: What is the focal length in cm of the convex mirrored surface?[br]Q2: What is the focal length in cm of the concave mirrored surface?[br]Q3: What is the focal length in cm of the converging lens?[br]Q4: What is the focal length in cm of the diverging lens?[br]Q5: In which of the four systems is a real image possible.[br][br]Please submit your drawings with measurements labeled along with the lab.

The goal of this experiment is to verify the thin lens equation, or that [math]1/f=1/d_0+1/d_i[/math].  We will do this for both a converging and a diverging lens.