PIRA: 6A61.00

Lab Equipment

  • Pin
  • Film case with pinhole in bottom


  1. Place film case with opening near eye and pin hole away from eye. 
  2. View an object that is several feet away.
  3. Push pin in from side of film case so it lies between eye and pinhole.
  4. As the pin is pushed inward it appears to the eye as though it is moving from the opposite direction and outside the case.