Waves from a Moving Source in 3D

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Below the wave speed, waves emitted from a moving source pile up in front and spread out behind, leading to a Doppler shift. Above the wave speed, waves accumulate at the sides, forming a conical shock wave. The sonic boom heard from a supersonic airplane occurs where the shock intersects the ground.

Contributed by: Stephen Wolfram (March 2011)
Open content licensed under CC BY-NC-SA



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