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Assertion : Electromagentic waves with f...

Assertion : Electromagentic waves with frequencies more than the cirtical frequency of ionosphere cannot be used for communication using sky wave propagation.
Reason : The refractive index of the ionosphere becomes very high for frequencies higher than the critical frequency .

A

Assertion is True . Reason is True, Reason is a correct explanation for Assertion

B

Assertion is True , Reason is True, Reason is not a correct explanation for Assertion

C

Assertion is True, Reason is Fase.

D

Assertion is False but, Reason is True .

Text Solution

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The correct Answer is:
B
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