A ground receiver station is receiving a signal at (a) `5 MHz and 100 MHz` , transmitted
Channel: Doubtnut
Date: 30/08/2020

A ground receiver station is receiving a signal at (a) `5 MHz and 100 MHz` , transmitted from a ground transmitter at a height of `400 m` located at a distance of ` 125 km`. Identify whether it is coming via space wave or sky wave propagation or statellite transponder. Radius of earth  ` = 6.4 xx 10^(6) m` , maximum number density of electrons in ionsphere ` = 10^(12) m^(-3)`.