Flatmirror

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45degree mirror

Students experiment to find that when two plane mirrors are placed at a 90-degree angle, the image of the first mirror is reflected in the second mirror so that the reversed mirror image is reversed again, and the viewer sees a true image. Reflection of Light With Two Plane Mirrors – Double Mirrors Placed at a 90-Degree Angle  [113KB PDF file] This activity is part of the Optics, Light, Color, and their uses Educator Guide.