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star wars - How were Anakin, Obi-Wan, and Palpatine physically trapped by a ray shield?


In Revenge of the Sith, Anakin, Obi-Wan, and Palpatine are trapped by a ray shield on the Separatist ship the Invisible Hand:


enter image description here


It is specifically called it a "ray shield" by multiple characters:




60 INT. BRIDGE-TRADE FEDERATION CRUISER


BODYGUARD: General, we found the Jedi. They're in hallway 328.


GENERAL GRIEVOUS: Activate ray shields.


61 INT. HALLWAY-TRADE FEDERATION CRUISER


They run down the hallway. Suddenly, ray shields drop around them, putting them in an electronic box in the middle of the hallway.


ANAKIN: Ray shields!



However, ray shields are (usually) only capable of stopping energy like blaster bolts. To physically block an object you need a particle shield.


The fact that ray shields do not block physical objects is supported by the (fully canon) Star Wars: The Clone Wars episode "Landing at Point Rain", in which Anakin was seeing running through a ray shield along with clone troopers1:


enter image description here



This shield is described as a ray shield in the episode description:



...On Geonosis, Separatist leader Poggle the Lesser, safe in his newly ray-shielded factories, creates thousands of terrible new weapons which march off the assembly line against the outnumbered clone army...



Ray shields' inability to block physical objects is also supported as a major plot point in A New Hope during the Battle of Yavin briefing:



DODONNA: The target area is only two meters wide. It's a small thermal exhaust port, right below the main port. The shaft leads directly to the reactor system. A precise hit will start a chain reaction which should destroy the station. Only a precise hit will set up a chain reaction. The shaft is ray-shielded, so you'll have to use proton torpedoes.



The Rebels needed to use proton torpedoes (as opposed to, say, the X-Wing's four blaster cannons) because proton torpedoes are physical objects:


enter image description here



MG7-A proton torpedo


Hence, the Death Star was only destroyed because its ray shielded thermal exhaust port was vulnerable to physical proton torpedoes.


How were Anakin, Obi-Wan, and Palpatine physically impeded by the Separatist ray shield when the plot in two other canon sources depended on ray shields' inability to block physical objects (including humans)?


Note that this question is not tagged with -- I have provisionally accepted the Legends answer, but I am still looking for a canon answer.




1 GIF taken from 15:44 of this Youtube video.



Answer



Okay so I did some googling and this is what I came up with from the starwars.wikia.com on deflector shields themselves not either of the 'sub-shields'.



Ray shields were also used as capture devices onboard capital ships; Obi-Wan Kenobi, Anakin Skywalker and Supreme Chancellor Palpatine were caught in a ray shield trap onboard Invisible Hand. Although designed to counter energy attacks, the energy given off by the ray shield would likely have disintegrated the Jedi duo had they attempted to pass through it.




Which fits in the behavior we have observed in the movies (obviously). Like I stated in my comment, in the original 3 movies the only definition given to a ray shields functionality is that it can be broken by proton torpedoes. That's it. So any behavior we see applied to them in later movies that doesn't directly contradict the "can be broken with proton torpedoes" rule we have to accept as acceptable behavior. Because that's what cannon is saying it can do.


To go along with this (this was the best clip I could find)





we can clearly see that they don't try to touch it and tend to not move much at all. Which seems to support the line "would likely have disintegrated them."

After reading here, here and following and reading a bunch of links from this page, and links on this page I've come up with this LEGENDS answer.


Ray/Energy shields are meant to deflect energy from blaster bolts. They are different from Particle shields in that they always allow physical objects to pass through them. However the radiation/electrostatic energy coming off a ray shield can be anywhere from annoying to deadly for organic matter.


Also the strength of a ray shield seems to be in "how much energy can I absorb before my circuits overload" not "how strong is the field I project". This is what made ray-shields useful as capture devices. They can be used anywhere without worry of suffocating your captured victim (which a particle shield would do as it inhibits all particles from crossing it's barrier), and still act as effective movement inhibitors because a strongly projected ray shield would be deadly to organic captives.



This leads to the following 2 scenarios pictured in the question. A weakly projected large shield on Geonosis capable of absorbing lots of energy but also capable of allowing clones/Geonosians to pass through it. And a much smaller but much more strongly projected capture field on the capital ship which would have allowed the Jedi/chancellor to pass but would have killed them in the process.


Out of universe I'll go back to my first comment:


Hand wavium forgetism... Basically it had been such a long time between the 2 movies that they forgot they had used the term "ray shield" and given it X definition. Alternatively, attention spans had shrunk drastically between the 2 movies so they decided "ray shield" worked better then "particle shield" because who doesn't like rays? and it takes less time to say.


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