Importance of Wireless Telegraphy

This discharge of a capacitor through an inductance is oscillatory if the resistance R of the circuit is less than 2√ (L/C). During the discharge, the energy of the charged capacitor is stored in the magnetic field produced in the inductance coil, then again back in the electric field between the capacitor plates, and so on. If the fields are caused to alternate rapidly, some energy escapes from the circuit permanently in the form of electro-magnetic waves which travel through space with the speed of light. These waves from the basis of wireless telegraphy.
Messages can be transmitted from one place to another with the help of codes.