PURPOSE: To model interference between two point sources.

DESCRIPTION: Two slides of identical concentric equally-spaced circles are superimposed on an overhead projector to create an effect analogous to interference between two identical monochromatic light sources. Spacing between the sources can be varied to simulate variation in slit spacing.

SUGGESTIONS:

REFERENCES: (PIRA 3B50.40)

EQUIPMENT: Klinger transparent slides (Stored as demonstration H2-23: INTERFERENCE - KLINGER TRANSPARENT SLIDES in sound cabinet) on overhead projector.

SETUP TIME: None.