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广播技术的发展:电子传播媒介,广播和电视的发展都是近代的事。广播业于1900年左右发展起来,1920年以后才广泛使用;而电视的主要原理虽在三十年代已发现,但五十年代才真正发展起来。二者的发展都十分迅速,恰如印刷业在1450年以后的飞速发展一样。但电子传播媒介发展的最初起源可追溯到1844年一位美国雕刻家塞穆尔·莫尔斯发明的电报。莫尔斯知道,电——一种已经为人们了解的动力——可以让一条金属形成电流。
The development of broadcasting technology: The development of the radio media and radio and television are both modern events. The broadcasting industry developed around 1900 and was only widely used after 1920; while the main principle of television was discovered in the 1930s, it really developed in the 1950s. The development of both is very rapid, just as the printing industry in the rapid development after 1450 the same. However, the original origins of the development of the electronic media can be traced back to the telegraphs invented by American engraver Samuel Morse in 1844. Morse knew that electricity - a power that people already knew - could make a metal form a current.