Induced Movement

Induced movement occurs when a moving object transfers its movement to a nearby stationary object. The stationary object then appears to move and the moving object appears stationary.


The black circle is moving to the right, but, under certain conditions, the green circle will appear to move left. Usually the movement will transfer to the smaller and brighter object.

Moving clouds over a stationary moon is a good example of induced movement. If the cloud speed is correct, the moon will appear to move and the clouds will appear stationary. The moon appears to move in the opposite direction of the cloud's actual movement.

Induced movement sometimes occurs at a traffic intersection. Imagine you are in a car stopped next to a large bus. If the bus slowly moves forward, you may feel as if your car is drifting backward. You're not really moving, but the forward movement of the bus induces the sense of movement in your car, and you feel that you are moving in the opposite direction from the bus.


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