Quote:
Originally Posted by theotherguy
So, are we saying there would or would not be a sonic boom at the formation of the vapor/cloud we see in the photo?
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The vapor cloud is not a necessary connection with the sonic boom it seems. That depends on many things, like air temperature, moisture, aeroplane speed and even the shape of the fast traveling "thing".. So, breaking the sonic barrier is not necessary to produce the cloud, if I understand things correctly.. But then again, if the sound barrier is broken, it is very likely that this phenomenon is produced.