Communication is the process of

The message fed to the transmitter are generally

Line of sight propagation is also called as ……………. propagation.

The ozone layer in the atmosphere absorbs

Modem communication systems consist of

What determines the absorption of radio waves by the atmosphere?

The portion of the atmosphere closest to the earth’s surface is ………

An antenna behaves as resonant circuit only when its length is ………

Space wave travels through …………

Transmission lines start radiating