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JEE PHYSICS MCQ: COMMUNICATION SYSTEMS

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In earth's atmosphere, for

{F}_1

-layer; the virtual height and critical frequency are

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Correct option: D

180 {~km}

and

5 {MHz}

Option D (

180 {~km}

and

5 {MHz}

) is correct because the F1 layer in the Earth's ionosphere typically has a virtual height around 180 km and a critical frequency around 5 MHz.

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