Eli5 what is the force behind a sonic boom?

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I know it comes from breaking the sound barrier, but why a boom instead of complete silence?
I have the understanding it creates a physical wave too.
Bonus questions: Does the pilot hear it?

Can the same thing be achieved underwater?

Related: I know the speed of sound is faster under water, does any reaction happen theoretically at the air speed of sound underwater?

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Anonymous 0 Comments

“light” is traveling way faster than the speed of sound. why doesn’t it make a boom?

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