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Assertion: The ionosphere layer acts as ...

Assertion: The ionosphere layer acts as a reflector for all range of frequencies.
Reason: Ionosphere does not allow electromagnetic wav e to penetrate and escape.

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D
The ionosphere layer acts as a reflector for a certain rang of frequencies is 3 to 30 MHz. Electromagnetic waves of frequencies higher than 30 MHz penetrate the ionosphere and escape.
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