In short wave communication waves of which of the following frequencies will be reflected back by the ionospheric layer, having electron density 10 11 per m 3
Text Solution
Verified by ExpertsThe correct answer is:
A
The critical frequency of a sky wave for reflection from an ionospheric layer of the atmosphere is given by, 
where 
is the number density of electrons /m 3 . It is given that
Hence the wave of frequency 2 MHz will be reflected back.
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