Describing briefly the structure of the ionosphere with diagram and its uses for radio frequency spectrum. Write the characteristics of ground eave propagation

A mast antenna consisting of a 50 meter long vertical conductor operatesover a perfectly conducting ground plane. It is base — fed at a frequencyof 600 KHz. The radiation resistance of the antenna in Ohms is ?

Mention the distance and frequency of type of radio waves approximately. Give the values only in the table space provided below. Name of wave          Maximum Distance              Frequency Surface wave   Space wave   Sky wave

If we consider the resistor, capacitor and inductor as the load connected to the twovoltage sources, at which range of frequencies can the load be considered capacitive(two decimal accuracy required)?