Additional Info

• ID Code: m9-31
• Purpose: Show interference from an optical ring sight.
• Description: This is apparently a gizmo that is used as a sight in certain types of guns as a substitute for the crosshairs. It looks a lot like Newton's rings, but it really is a polarization phenomenon. The screen is about 6 feet away.
• Availability: Available
• References: REFERENCES: (PIRA unknown.) See Demonstration Reference File for a relatively complete discussion of how these optical devices work.