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Pair of glass plate, optically polished, 60mm diameter one plane the other plano-convex mounted together in metal frame. Pressure between plates adjustable by three brass nickel plated screws. |
NEWTON RING APPARATUS – GUPTA BRAND 8006239
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Pair of glass plate, optically polished, 60mm diameter one plane the other plano-convex mounted together in metal frame. Pressure between plates adjustable by three brass nickel plated screws. |