Cherenkov radiation
Wikipedia article below about this “Sonic Boom” technology / radiation / you will probably feel it when man made disaster Trumpet Number One is executed.
Cherenkov radiation (/tʃəˈrɛŋkɒf/[1]) (also known as Čerenkov radiation) is electromagnetic radiation emitted when a charged particle (such as an electron) passes through a dielectric medium (such as distilled water) at a speed greater than the phase velocity (speed of propagation of a wavefront in a medium) of light in that medium. A classic example of Cherenkov radiation is the characteristic blue glow of an underwater nuclear reactor. Its cause is similar to the cause of a sonic boom, the sharp sound heard when faster-than-sound movement occurs. The phenomenon is named after Soviet physicist Pavel Cherenkov.
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Nikola Tesla and others have shown that the speed of light is not the fastest in fact this was in the book Savage kings – defeated by Reverend Dr Graham J Whelan.
By the way Space is not a vacuum! If it was water would not have fell from the sky in Noah’s flood!
If you want to research more remember you will be fed a lot of rubbish and disinformation please watch read and learn using a pinch of salt
Cherenkov Radiation