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bow wave
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bow wave
bow wave Bow waves of a canal ship.

bow wave

physics
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Also known as: bow shock
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bow wave, progressive disturbance propagated through a fluid such as water or air as the result of displacement by the foremost point of an object moving through it at a speed greater than the speed of a wave moving across the water. Viewed from above, the crest of the bow wave of a moving ship is V-shaped; the angle of the V is determined by the relative speeds of the ship and of the propagation of waves in the water. In three-dimensional space—for example, when describing the wave produced by a plane flying at supersonic speed—the bow wave is conical in shape. In this case an observer on the ground experiences a sonic boom when the bow wave passes. See also wave motion.

This article was most recently revised and updated by Amy Tikkanen.