6A45.u2 - Collimator Model
To demonstrate how a collimator takes an incoming signal and produce parallel rays of an outgoing signal, in this case light.
Place the collimator model in front of an incandescent light bulb. Place a camera on the other side of the collimator and image the area where the collimated light comes through.
Turn on the light bulb and view the collimated light with the camera. Then turn out the lights and see how that compares with the image with the lights off.