In Star Wars II Attack of the Clones, Jango Fett was chased to Geonosis by Obi-Wan Kenobi. While dodging the asteroids in the planet's dense ring system, Jango deploys a bomb, a "Seismic Charge" or "Sonic Mine", which works like this:
A few seconds after launch, a seismic charge would detonate into a blue ball-shaped explosion which had the unusual side-effect of drawing in all sound from a given area around it. This small explosion soon collapsed in upon itself before releasing a shock wave of energy that would obliterate material in its path. They were particularly effective in asteroid fields, enabling the pilot to clear an area of hazardous asteroids. Such seismic waves were even capable of penetrating thin durasteel plating, though the Void-7 seismic charge was much more powerful.http://starwars.wikia.com/wiki/Seismic_charge
A few problems: First
, how exactly is a Seismic charge capable of 'drawing' all the sound in a given area around it when there's no sound? The battle occurred at the asteroid ring far from the planet's atmosphere. Without atmospheric gasses to conduct sound vibration, how does it draw in all the sound? How does go PING! When it detonates?
Of course, the Behind the Scene section addresses this problem:
The idea during the production of Episode II was that the charge would suck in and absorb all the sound around it (such as the sounds of Obi-Wan Kenobi and Jango Fett's ships during their fight in the Geonosis asteroid belt), and then release them in a sonic explosion, resulting in the shockwave effect heard in the explosion sound.
That still does not address the fact that there is no gaseous medium to generate sound. And how does it 'draw' sound from the two ships? Does it suck in gas from the cockpits of the spacecrafts so it could generate sound? Does the bomb achieve this by manipulating matter via something like Quantum Entanglement?Second
, what kind of bomb devise works by collapsing an explosion on itself, and then release its energy in a planar shockwave? For the implosion, there's only two possibilities where this could happen:
==> One, the bomb is basically a thermonuclear device, an implosion type weapon using nuclear materials similar to plutonium which is compressed by a sphere of explosives and increasing its density by twice to four times its original, causing them to go critical. All this occurs in less than a fraction of a second and it still does not explain how the original explosion could be seen falling into itself, or focusing a blast into a planar shockwave.
==> Two, the bomb works by creating a small miniature sun which immediately goes supernova, or more accurately a gravitational collapse. In this case, a sun or something similar created in an explosion in which the outer layers of the explosion-structure free falls inwards, counter balanced by the total outward pointing gravitational force from the core of the explosion-structure, followed the outer layer is pushed out by a more powerful outward pointing gravitational force from the core. (This was hinted to be the case, as quoted from Wookiepedia:
The detonation of this weapon and subsequent shockwave are similar to the process through which a massive star dies by becoming a supernova, albeit at a greatly enhanced rate and utilizing primarily energy instead of matter.
And both cases still doesn't explain how does the bomb focus the outward blast into a planar shockwave that could cut through asteroids and ships? Something like the bomb-pump laser set-up but works on shockwaves?Third
: Practicality. How practical is a bomb which the damaging vector is two dimensional? In the hilarious Star Wars parody webcomic Darths and Droids issue 294, D&D player Jim, the macho hotheaded hero who happens to be a Geophysics student suggests that by creating a shockwave that travels in a "inverse linear profile, rather than linear square," the planar shockwave created "increases range and energy density at the cost of solid angle coverage.", making it extremely destructive. Wookiepedia info states that it makes clearing asteroids and smashing through durasteel plating more effective. But then again, it means that you have to aim it right, and nowhere was a mechanism suggested in the bomb or the spacecraft in Wookiepedia that allows the bomb to adjust its direction towards the area and target Jango wants the bomb's planar shockwave to go through.
So, really, how does the Seismic Charge really work? I am not really sure...