A ground receiver station is receiving a...

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 satellite transponder. Radius of earth
` = 6.4 xx 10^(6) m` , maximum number density of electrons in ionosphere ` = 10^(12) m^(-3)`.

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The correct Answer is:

(i)5kg (ii)space

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