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Apr
14
comment What do bullet trails really look like?
Thanks for clarifying, tmac. That's what I expected. I wonder if you could comment on dmckee's answer below. In his images, I presume air rifle bullets are subsonic. Should any distortion be visible for bullets travelling below the speed of sound?
Apr
12
comment What do bullet trails really look like?
Thanks, tmac. Based on your images and assuming supersonic bullets, am I correct to conclude that the main effects are (1) a small cloud just behind the bullet and (2) a blunt refracting cone shell just ahead of it? From equation BoatSpeed = WaveSpeed x tan(PI/2-Angle) at physicsforums.com/showthread.php?t=328445, is it right that the cone's half-angle is PI/2 - atan(Mach number) i.e. 39 degrees for 1380 ft/s bullets from Desert Eagles that Agents use? It's unclear from the shadowgraph how far the cone extends or how visible it is to the naked eye. Any idea? What about subsonic bullets?
Apr
12
awarded  Supporter
Apr
12
comment What do bullet trails really look like?
Could you please explain "a non-trivial stretch of space before the bullet's point of impact?" Perhaps my question was unclear: I wish to know what a bullet trail looks like as it is flying through air, not after it has hit a solid or liquid object. In your examples, most of the particles are debris from the target.
Apr
11
asked What do bullet trails really look like?
Mar
1
awarded  Student
Mar
1
awarded  Editor
Mar
1
revised Effect of surface treatment on fair dice
Extend question
Mar
1
asked Effect of surface treatment on fair dice