Скачать с ютуб Transmission and Propagation of Electromagnetic Waves || Chapter#16 || 12th Class Physics в хорошем качестве

Transmission and Propagation of Electromagnetic Waves || Chapter#16 || 12th Class Physics

The transmission of electrical energy by wires, the broadcasting of radio signals, and the phenomenon of visible light are all examples of the propagation of electromagnetic energy. Electromagnetic energy travels in the form of a wave. Its speed of travel is approximately 186,000 mi/s (3 × 108 m/s) in a vacuum and is somewhat slower than this in liquid and solid insulators. An electromagnetic wave does not penetrate far into an electrical conductor, and a wave that is incident on the surface of a good conductor is largely reflected. The process of communication involves the transmission of information from one location to another. As we have seen, modulation is used to encode the information onto a carrier wave, and may involve analog or digital methods. It is only the characteristics of the carrier wave which determine how the signal will propagate over any significant distance. This chapter describes the different ways that electromagnetic waves propagate. electromagnetic waves #the_base_academy #adeel_akhtar