PIRA: 6A65.45


 Lab Equipment  Directions
  1.  SP 155 laser
  2. Pasco laser bench
  3. beam splitter and holder
  4. lab jack
  5. large plano-convex lens
  6. paper screen
  1.  Put the laser on the bench and the large lens on the lab jack in front of the laser. Adjust the position and height of the lab jack until the laser beam goes through the center of the lens.
  2. Set the beam splitter in its holder in front of the laser. Adjust the beam splitter until several rays hit the screen after passing through the lens.
  3. Observe what happens to the pattern when you move the screen closer and further from the lens. The rays do not all focus at the same point.