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Statement-1: Television signals are rece...

Statement-1: Television signals are received through skywave propagation.
Statement-2: The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical requency.

A

Statement-1 is true, Statement-2: is true, Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is true, Statement-2: is true, Statement-2 is NOT a correct explanation for Statement-1.

C

Statement-1 is true but statement-2 is false

D

Statement-1 is false, Statement-2 is true

Text Solution

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The correct Answer is:
D
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Statement-I : Television signals are received through sky-wave propagation Statement-II : The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical frequency.

Statement-1: Television signals are propagated through sky waves. Statement-2 : Television signals have frequency in the 100-200 MHz range.

Statement-1 : Electromagnetic waves with frequencies smaller than the critical frequency of ionosphere cannot be used for communications using sky wave propagation. Statement-2: The refractive index of the ionosphere becomes very high for frequenceis higher than the criritcal frequency.

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 .

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