optics.gif (6954 bytes)

MECHANICAL REFRACTION MODEL






EQUIPMENT
    redball.gif (326 bytes) Incline
    redball.gif (326 bytes) Wheels




NARRATIVE
         Adjust the inclined plane so that the wheels and axle just roll over the white paper. While on the paper, the wheels change direction as the light beam would in going from n1 to n2, where n2 > n1, and both n1  and  n2 are indices of refraction.