In earth's atmosphere, for ${{\rm{F}}_2}$-layer, the virtual height and critical frequency in night time are

JEE PHYSICS MCQ: COMMUNICATION SYSTEMS

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In earth's atmosphere, for

{\mathrm{F}_2}

-layer, the virtual height and critical frequency in night time are

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Correct option: D

350 km and 6 MHz

Option D (350 km and 6 MHz) is correct because the virtual height of the F2 layer is typically around 350 km and the critical frequency is around 6 MHz during nighttime.

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