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Optical fiber is a cable made of glass or plastic fibers that can be used to transmit light from one point to another. By transmitting light instead of electricity, optical fiber has various advantages over copper cables and other transmission media. In p...  большеOptical fiber is a cable made of glass or plastic fibers that can be used to transmit light from one point to another. By transmitting light instead of electricity, optical fiber has various advantages over copper cables and other transmission media. In particular, it can carry much more data in the same cable length and it also requires much less energy to operate. However, even though it’s a newer technology, optical fiber cables are still much more expensive than traditional copper wire for internet connections – around 20 times more expensive per mile! So why is optical fiber so expensive? Let’s take a look at some cost factors.  меньше

American space agency NASA on Tuesday announced that it will delay the launch of its water-hunting VIPER Moon rover by a year in a bid to allow more time to develop a landing vehicle for the mission.