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This set of six glass lenses can be used to demonstrate optical properties. Each lens is 50 mm diameter and comes in a labeled envelope. You get one each of the following glass lenses with focal lengths as noted: double convex (+15 cm), plano-convex (+30 cm), concave-convex (+50 cm), double concave (-15 cm), plano-concave (-50 cm), and convex-concave (-30 cm). Combine lenses to demonstrate the properties of more complex optics.
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