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Pulse (physics)
In physics, a pulse is a single disturbance that moves through a medium from one point to the next point.
==Pulse Reflection==
Consider a pulse moving through a medium - perhaps through a rope or a slinky. When the pulse reaches the end of that medium, what happens to it depends on whether the medium is fixed in space or free to move at its end. For example, if the pulse is moving through a rope and the end of the rope is held firmly by a person, then it is said that the pulse is approaching a fixed end. On the other hand, if the end of the rope is fixed to a stick such that it is free to move up or down along the stick when the pulse reaches its end, then it is said that the pulse is approaching a free end.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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