Periscope

DCS Code: 6A10.39 Last Updated: March 27, 2026
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Purpose

Demonstrates the law of reflection and ray tracing with two plane mirrors. Rotating the mirror attachments changes the image orientation, showing that mirror angle determines the output ray direction.

White PVC tube periscope with black angled end caps containing plane mirrors, lying on a table with an eraser for scale
Figure 1: Periscope made from a white PVC tube with black 45-degree elbow fittings housing plane mirrors. The end caps rotate to change mirror orientation. Eraser shown for scale.
Equipment