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EISCO High Quality Glass Lenses, Set of Four, Double Convex & Concave Lenses of Dia. 50 mm, Polished, High Quality : Amazon.in: Industrial & Scientific
Slabs Plus - Concave VS Convex 🤓 ➖ Concave lenses have a hallow curved front. This "minus" lens causes light rays to diverge or spread apart ➖ ➕ Convex lenses have a
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