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Hitachi

Fig. 2 Single electron events build up to from an interference pattern in the double-slit experiments.
Fig. 2 Single electron events build up to from an interference pattern in the double-slit experiments.

The number of electron accumulated on the screen. (a) 8 electrons; (b) 270 electrons; (c) 2000 electrons; (d) 160,000. The total exponsure time from the beginning to the stage (d) is 20 min.