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Inverting Spectacles Complete with two fully rotating inverting prisms in a shielded spectacle frame. The inverting prisms produce a lateral inversion of the rays – the world thus turns "upside down". Besides being a lucid demonstration ... еще

The Fun House Mirror is a high grade polyester sheet with a vacuum deposited silver metal surface. This is a great way to teach concave and convex mirrors as well as real and virtual images. Let your imagination run wild! Available in two ... еще