Make a curved mirror for use with a light station, by cutting a 4" x 4" x 4" corner of a box (to provide a rigid support for the mirror), and taping a 4" x 8" piece of aluminized plastic in place. Here is a top view of the assembly:
    
Note that you can pop the mirror from convex to concave without untaping it.
Now set up a light beam station, but with a screen having three or four vertical slots, spaced 1/2" apart. This will produce beams of light that are roughly parallel to each other -- especially if the light source is not too close to the screen.

1. What happens to the beams when the mirror is convex? If you trace the reflected beams backwards into the mirror, do they all seem to come from the same place?
2. What happens to the beams when the mirror is concave?
3. Now change how you have mounted the aluminized plastic, so that it is more curved (or less curved). How does this affect the behavior of the convex and concave mirrors?
   Box:
   Next activity: an optical toy