6D10.90 3D Interference Pattern
Direct the laser interference pattern from the back of the room off a mirror and toward the students into a smoke filled box.
Note: For better results use the high-powered diode laser.
As mentioned in AJP Volume 51, Page 380, the purpose of this demo is as follows: “Since students see nothing between the slits and screen, they often have difficulty relating the variation in brightness of the light on the screen to the path of the light after passing through the slits.” Therefore, this demo is meant to give students a 3D visual that they can easily observe.
Location: Laser: R2-3; Pasco Slides: J3-2; Mirror: M6-6; Plexiglass Box: M4-1; Smoke Machine: N2-6