Long‐living luminous objects, forming in large‐scale water cavity

During research of electric discharge in water the authors found a new type of cavitative luminescence. The difference in it was that the luminescence was not connected to a collapse of the cavity, and was observed during all period of pulsation of the cavity. Radiation from the cavity was registered not from all volume of a bubble, and from areas with sizes much less than the diameter of the cavity. The time of life (luminescence) of these formations by three orders surpassed the characteristic lifetime of breaking up discharge plasma, therefore the authors named them long‐living luminous objects (LLO). LLO had a spherical form and were transparent. The brightness of its luminescence did not decrease monotonously, and had a flashing character. For further research of LLO a special chamber has been made, allowing one to throw out luminescence objects from water to air. We report the results of the set of experiments, which have enabled to estimate some properties of LLO in water and air.