SORU: boş bırakılan yere parçanın anlam bütünlüğünü sağlamak için getirilebilecek cümleyi bulunuz
Electronics and communications have been completely transformed by technological advances in materials. A good example is opticalfibre cables that have replaced long-distance telephone cables made of copper wire. Optical fibres are fine threads of extremely pure glass. ---- Not only are optical-fibre cables cheaper and less bulky than copper cables carrying the same information, but also by using different colours of light, optical-fibre cables can carry voice, data, and video information at the same time.
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In fact, in view of staggering advances in scientific research and technological application, one can say that scientists continue to develop new materials and discover new properties of old ones. |
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Scientists have demonstrated that they can transform light pulses into electronic computer signals at the rate of 3 billion bits of information a second. |
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Marconi (1874-1937) invented and developed the wireless telegraph, which could send messages hundreds of kilometres at the speed of light without the use of wires. |
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Because of their purity, these fibres can transmit laser light pulses for miles compared with only a few inches in ordinary glass. |
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Moreover, chemists could correlate molecular structure with the characteristics of materials and so begin to fashion materials with special characteristics. |