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An introduction to the lens experiments of LIGHT AND DARKNESS. The GLASS BALL is a hollow sphere. Partially or completely filled with water, it becomes a magnifying glass or lens. When held under water as a large air bubble, miniaturizations are created. The various intermediate stages and unexpected mirror images are really exciting. Even prism effects can be observed. Experiment kit from 9 years Size 6.5×6.5×4.5 cm Weight 41 g
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