The model is complete with lenses, a diagram showing path of rays and is fitted on stand, for demonstration.
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Metal holder with sides grooved to hold lens up to 50 mm diameter on wooden support.
Optically worked, back silvered, with protective coating.
Rectangular, glass, back silvered, with protective coating
Free from air bubbles, all sides polished
Wooden block 50 x 50 x 50 mm with slot to take rectangular mirrors.
Diameter 25 mm, mounted in plastic eye-grip frame x 2.5 x 3 x 3.5 x 4
Brass dial head 40 mm diameter, divided and marked in 100 divisions, vertical scale 10-0-10 mm, fitted on tripod stand, distance between legs 40 mm.
Sizrs are mentioned below:- Screw pitch 1 mm Screw pitch 0.5 mm
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