The impact of the telegraph on the last century can be said to be very huge. Its application fields are very wide, and it is used in various places, such as communication, instead of the long and inconvenient delivery time of letters. The telegraph was developed in Britain and the United States in the 1830s. Telegrams are sent by means of electrical signals, which use codes to replace words and numbers. The commonly used code is Morse code. When we watch war movies and TV dramas, we often see it playing a huge role in conveying information, commanding and dispatching, etc.
1. The inventors of the telegraph
The invention of the telegraph is mainly attributed to British scientists John Cook, Wheatstone and American scientist Morse. John Cook built the electromagnetic telegraph and applied for the first telegraph patent. Wheatstone was a collaborator with John Cook. Morse was originally a first-class painter in the United States. Later, he invented the famous "Morse Code" based on the principle of electromagnetism. Although Morse code is now far away from us, it is still feasible to use Morse code to call for help when it is inconvenient to encounter dangerous situations.
2. Application of Telegraph
The most common application field of telegraph is the military field. After the outbreak of World War II, telegraph played a vital role. For example, we are well-known for the attack on Pearl Harbor and the Anti-Japanese War. Especially during the Anti-Japanese War, it played a decisive role. At that time, the facilities of our intelligence department were relatively crude and lacked many advanced communication equipment. However, relying on the telegraph machine, we sent a lot of top-secret information, which brought hope and victory to our later victory in the Anti-Japanese War. hope.
3. The decline of the telegraph
With the development of communication technology, the telegraph is no longer the main communication method. Later, telegraph communication was gradually replaced by the emergence of telephones and smart devices. The waves of history always push the waves ahead, and breakthroughs in the technological field accelerate the replacement of new generations. But recalling that era of war, invisible telegrams and encrypted codes conveyed all kinds of secret information.