Many people were involved in the invention of radio as we now know it. Several possible methods of wireless communication were considered, including inductive and capacitive induction and transmission through the ground, however the method used for radio today exclusively involves the transmission and reception of electromagnetic waves.
After early speculation on the subject, experimental work on the connection between electricity and magnetism began around 1820 with the work of Hans Christian Orsted and continued with the work Andre-Marie Ampere, Joseph Henry, and Michael Faraday. These investigations culminated in the complete theory of electromagnetism developed by James Clerk Maxwell. The theory described the theoretical basis of the propagation of electromagnetic waves.
After Maxwell's theory was published many people experimented with wireless, some intentionally using Maxwell's theory some not. It is considered likely that the first intentional transmission of a signal by means of electromagnetic waves was performed by David Edward Hughes around 1880. Guglielmo Marconi etc. invented radio.
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