In short wave communication waves of which of the following frequencie – McqOptions

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1.	In short wave communication waves of which of the following frequencies will be reflected back by the ionospheric layer, having electron density 1011 per m3 [AIIMS 2003]
A.	2 MHz
B.	10 MHz
C.	12 MHz
D.	18 MHz
Answer» B. 10 MHz

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