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luckis11
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(like the wavefront that is photographed when it travels through air)
This is a hint.DrClaude said:What do you think this wavefront is made of?
This is your acknowledgment that you understand the hint.luckis11 said:Nothing,
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.luckis11 said: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.
Physics_UG said:The wavefront is made of AIR. If there is no air there will be no wavefront. DrClaude's question was rhetorical.
I left out the shockwave as it travels through the solar wind also.mfb said:You can even say it has a velocity of 299,000 km/s - in a frame moving with roughly 299,000 km/s relative to us.
No air, not even a meaningful single velocity value.
luckis11 said: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?luckis11 said:"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.
A wavefront is a line or surface representing points in a wave that are in the same phase. In a vacuum, a bullet does not have a wavefront stuck in its nose because there is no medium for the bullet to create a wave in.
Yes, a bullet can travel through a vacuum without a wavefront. The concept of a wavefront is only applicable to waves, and in a vacuum, there is no medium for a wave to travel through.
The lack of a wavefront in vacuum does not affect the trajectory of a bullet. The bullet will continue to travel in a straight line according to Newton's first law of motion.
No, the lack of a wavefront in vacuum is not a disadvantage for a bullet. In fact, it can be an advantage as there is less resistance and drag on the bullet, allowing it to travel at higher speeds.
No, there are no situations where a bullet would have a wavefront in its nose in vacuum. As mentioned before, waves require a medium to travel through, and a vacuum does not provide such a medium.