PIRA: 6C20.10


 Lab Equipment  Directions
  1.  Spectra Physics 248 high-powered laser and power supply strapped to white board with magnet strip
  2. black plastic lab jack
  3. special can with magnets and ball bearings
  4. 18 mm lens and steel lens holder
  5. lab jack
  1.  Set up as shown with the laser supported by one lab jack and the lens and magnetic holder in front of the laser.
  2. Turn on the laser and the lens spreads the beam. Aim it at the wall.
  3. Position the can on the second lab jack so that the ball bearing on the nail inside the can is in the center of the beam.
  4. Notice the small spot of light in the center of the bearing’s shadow on the wall.