INTERFERENCE PLATES

Demo Number	263
Location	Shelf 40
Description	Use these glass plates to view the “wedge fringes” of interference. Works well viewing the reflection of a diffuser that’s back lit by the sodium lamp.
Related Demos	269
Tips	Allow sodium lamp to warm up for at least 5 minutes. Fit diffuser over sodium lamp and clean glass plates with lens wipes. To view fringes, the plates may actually have to be squeezed together slightly to make a narrow enough gap to view wedge interference fringes. Sodium lamp (with diffuser) Demo 269 shelf 46.

Colorado State University