Glass plate with four scales and three geometrical objects for quantitative experiments on geometric optics.
Diameter: 40 mm
Thickness: 1.5 mm
Length of scale: 10 mm
Graduation: 10 mm, 2 mm, 1 mm, 0,5 mm
Geometrical objects: Arrow 30 mm long; Square 5 mm side length; Disc 5 mm diam.