Computer Networking
The core diameter of a single-mode fibers is about

10 times the fiber radius
7 times the light carried in the fiber
3 times the wavelength of the light carried in the fiber
10 times the wavelength of the light carried in the fiber
None of these

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Computer Networking
In geosynchronous orbit, satellite

moves faster than the earth's rotation so that it can cover larger portion of earth.
remains in a fixed position related to points on earth
None of these
moves simultaneously
remains in a fixed position so that as earth rotates, it can fully cover the earth

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