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M9-31: OPTICAL RING SIGHT 9 years 7 months ago #1071

  • zzfixk21
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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

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