Top Spinning Base, 3″ (75mm) Surface – Double Concave – Optical Glass Lens, 200mm Focal Length – Optically True – Ground, Beveled Edges – Eisco Labs

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Amazon.com Price: $10.49 (as of 12/27/2020 20:37 PST- Details) & FREE Shipping.

Description

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DOUBLE CONCAVE || Highly polished, double concave lens
SPHERICAL || Lens measures 3″ (75mm) in diameter and approximately 12mm thick
200MM FOCAL LENGTH || Diverging lens with a 200mm focal length
OPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with beveled, ground edges
GREAT FOR PHYSICS CLASSROOMS or TOP SPINNING || This optically true lens is excellent for physics classroom demonstrations in optics and light refraction. It’s smooth, concave surface also makes this lens ideal for top spinning

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