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Difference between revisions of "Spanreed"
He mentions this in his TikTok video on Quantum Entanglement. Not sure how to properly cite that. It was about how they cannot communicate FTL, due to a delay in the transfer of energy.
(He mentions this in his TikTok video on Quantum Entanglement. Not sure how to properly cite that. It was about how they cannot communicate FTL, due to a delay in the transfer of energy.) |
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A '''spanreed''' is a type of [[Fabrial#Conjoiner| conjoiner fabrial]] developed sometime before the [[War of Reckoning]] that enabled long distance communication on the world of [[Roshar]].{{book ref|sa1|28}}{{book ref|sa1|part=ars}}
Spanreeds, like all conjoiner fabrials, are made by capturing a spren inside a ruby and splitting it in half.{{book ref|sa3|100}} The two halves are then embedded in reed pens. The two pens can then mimic the movements of the other, exactly. The energy required for the second pen to move is provided by the holder of the first pen, which feels twice as heavy as an ordinary pen would.{{book ref|sa1|part=ars}} The farther apart spanreeds are, the heavier the pens became after activation. This can be used to triangulate the position of the opposite spanreed.{{book ref|sa4|28}} Furthermore, they cannot communicate faster-than-light, due to a mixture of the fact they grow heavier the further apart they are, and a lag between the communication of two spanreeds, presumably proportional to the distance between them.{{cite}}
The setting of the ruby can be rotated to switch between different "modes." One is to alert the possessor of the spanreed's twin that a conversation is desired. Another to alert the first that the message was received. The third and fourth notches sync the movements of the two pens, each notch makes one pen the transmitter and the other the receiver.{{book ref|sa1|28}} Vorin men who do not write can communicate with a spanreed by turning the gem on and off to indicate that they are still alive.{{book ref|sa3|64}}
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