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1. A radio wave is incident on a layer of ionosphere at an angle of 30° with the vertical. If the critical frequency is, 1.2 MHz, the maximum usable frequency is





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  • By: guest on 02 Jun 2017 12.56 am
    fmuf = for sec i = 1.2 x 106 x sec (30°) = 1.386 MHz.
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