After-effect of seen motion; Bewegungsnachbild

Japanese: 運動残像 - うんどうざんぞう（英語表記）after-effect of seen motion; Bewegungsnachbild

The impression of motion that appears when you turn your eyes to a stationary object immediately after observing a moving object for a while. This phenomenon occurs when you gaze at a moving object for a while and then turn your eyes to a stationary object. The stationary object appears to move in the opposite direction to the direction of the movement you were looking at just before. This phenomenon also occurs when you gaze at the flow of water in a waterfall and then look at the surrounding scenery, so it is also called the waterfall illusion. (→ Motion perception )

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

運動している対象をしばらく持続観察した直後，静止対象に眼を転じた際に現れる運動印象。静止対象が，直前に見ていた運動方向とは反対の方向に動くように見える現象で，滝の水の流れを凝視してから付近の景色を見る際にも現れるので，落水の錯覚 waterfall illusionなどとも呼ばれる。 (→運動知覚 ) 　

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