When radio waves from transmitting antenna reach the receiving antenna directly or after reflection in the ionosphere, the wave propagation is called …………

Basic components of a transmitter are …………

The process of changing some characteristics of a carrier wave in accordance with the incoming signal is called ………

The process of superimposing a low frequency signal on a high frequency wave is …………

A device that converts one form of energy into another form is termed as …………

A microphone which converts sound into electrical signal is an example of .

The process of regaining of information from carries wave at the receiver is called

Range of communication can be increased by

Ionosphere mainly consists of

The reflected waves from the ionosphere are