(like the wavefront that is photographed when it travels through air)
On this forum, we require our members to put thought into their own questions. It helps them learn. That's why those questions were asked of you.Nothing, I am asking for proofs with photographs, I am not supporting a theory that it is there or it is not there. Also, if nothing is seen at a photograph then I do not support the theory that it is there nor the theory that it is not there, I just want to find out.
The proof is some photographs you've seen? Where are they.
The title of this thread says "vacuum". Now you want shock waves in air. I googled "shock wave images' (a reasonable enough phrase) and was flooded with pictures of objects moving high speed through air. Have you tried anything similar?"The wavefront the bullet has at its nose, is sound that cannot travel faster than the bullet, that΄s why it's stuck there, therefore I should not expect an electromagnetic wavefront stuck at the nose of the bullet unless its speed is at least the speed of light". I should not expect it to be photographed, or to exist? When a ball moves with e.g. 1metre/sec, it leaves a void behind it that air comes and fills it, therefore I expect a high density layer of air in front of the ball that is always stuck in the front of the ball, except the sound wavefront. So, instead of assuming I am all-knowing like God and know what΄s going on, I asked you of photographs of bullets in air void. Of any faster objects (not sub-atomic particles etc), also welcome.