Kablerne under havet
Long cables under the ocean carry almost all of the information that travels between countries.
Before you read
Before you read
Når folk sender en besked til et andet land, rejser beskeden ofte under havet. Lange kabler ligger på havbunden. De forbinder byer og lande over hele verden.
Kablerne er ikke særlig store. Mange er lige så tynde som en haveslange. Indeni er der tynde tråde af glas, hver enkelt lige så tynd som et hår. Lys bevæger sig gennem glasset meget hurtigt og bærer informationen med sig.
Disse kabler udfører et vigtigt arbejde. De bærer omkring femoghalvfems ud af hver hundrede beskeder, der sendes mellem lande. Der er mere end seks hundrede kabler i havet i dag, og tilsammen er de meget, meget lange. De krydser hvert eneste hav på Jorden.
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