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Matched convex/concave lens set will enhance understanding of refraction.
Two matched lenses, one concave and one convex, when placed together, result in no magnification at all - like flat glass. Let students independently find the focal lengths of each lens and predict what will happen when they are combined. Focal length +/- 115mm, 38mm diameter, made of glass with a plastic storage box.
Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.
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