Critical frequency of ionospheric layer is 10 MHz what is the maximum launching angle from the horizon for which 20 MHz wave will be reflected by the layer?

Critical frequency of ionospheric layer is 10 MHz what is the maximum

1.	Critical frequency of ionospheric layer is 10 MHz what is the maximum launching angle from the horizon for which 20 MHz wave will be reflected by the layer?
A.	0
B.	30
C.	45
D.	90
Answer» C. 45

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Critical frequency of ionospheric layer is 10 MHz what is the maximum launching angle from the horizon for which 20 MHz wave will be reflected by the layer?

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