Marconi invented the telegraph and radio communication technology.
Guglielmo Marconi invented the practical telegraph, a working device, and patented his invention. He also invented radio communication technology, and radio messages successfully crossed the Atlantic Ocean from England to Newfoundland, Canada.
Telegraph:
Telegraph is the earliest way to use electricity to transmit information, a reliable method of real-time long-distance communication. It was developed in the United Kingdom and the United States in the 1830s. of.
Telegraph information is sent in the form of electrical signals through dedicated switching lines. The signals use codes to replace letters and numbers. The commonly used code is Morse code. With the popularization of telephones, faxes, etc., telegraphs are rarely used.
Radio communication technology:
Radio is a technical means that uses electromagnetic waves to radiate and propagate in space to transmit information.
In 1864, the British Maxwell proposed the famous "Maxwell's equations" based on summarizing the work of his predecessors. He used very incisive and subtle mathematical equations to clarify the basic relationship between electric fields and magnetic fields.
In 1887, German scientist Hertz experimentally confirmed the existence of electromagnetic waves. In order to commemorate Hertz's contribution in the discovery of electromagnetic waves, people use "Hertz" as the unit of frequency.
In 1895, Italian scientist Marconi used electromagnetic waves generated by spark discharge to transmit Morse code hundreds of meters away, realizing an experiment in radio communication.
In 1897, Marconi succeeded in wireless communication across the Bristol Channel, with a communication distance of 14km. Since then, humankind's application of radio has opened a new curtain, and radio technology as a new science has been born.