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Re:Memory Bandwidth Napkin Math by 867-5309 on Tuesday February 11, 2020 @07:26AM (#22297901)
> Light travels 31% slower in fiber optic cables than it does in a vacuum.

in 2013 this was reduced to 0.03%, but the abstract does not allude to distance or cost

https://www.nature.com/articles/nphoton.2013.45

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