Q: Say you're sitting on a train, waiting to leave the station, and the train begins to move. Then you feel something is wrong, and you realize that your train is not moving at all. Instead, the train on a neighboring track is moving. Does a term exist for this feeling?
A: Yes: The feeling is known as "induced motion." Another misleading feeling is called "motion after-effects." It occurs when you've been watching a moving scene - one studied example is a waterfall - then look away at a stationary scene or object. For a few moments, the object appears to be moving in the opposite direction. Trains cause this feeling too.
-Ask Marilyn
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