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Two waves A and B of frequencies 2MHz an...

Two waves A and B of frequencies 2MHz and 3 MHz, respectively are beamed in the same direction for communication via sky wave. Which one of these is likely to travel longer distance in the ionosphere before suffering total internal reflection?

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The correct Answer is:
C

penetrating power of signal `alpha` frequency of signal. So, 3 MHz signal travels longer distance in ionosphere.
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