| 摘要 |
PURPOSE: To display a model of a UFO, the earth or the like as a false model and, at the same time, enhance the displaying effect of a device by changing the radiating state of each model in a display, in which plastic false model is allowed to swim by jetting air bubbles in a water tank. CONSTITUTION: In a display, in which false models in a water tank are allowed to swim by jetting bubbles upwards from the bottom surface of the water tank through air nozzles, a model 6 of a UFO, which is equipped with a fluorescent plate disk and the specific gravity of which is prepared to be 1±0.002, is employed as the false model and, at the same time, the interior of the water tank is illuminated from above by means of a light source 5.
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