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JEE PHYSICS MCQ: COMMUNICATION SYSTEMS
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Which of the following statement is NOT correct?
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Correct option: C
Electromagnetic waves of frequencies higher than
about 30 MHz cannot penetrate the ionosphere
about 30 MHz cannot penetrate the ionosphere
Option C (Electromagnetic waves of frequencies higher than about 30 MHz cannot penetrate the ionosphere) is correct because electromagnetic waves with frequencies above the critical frequency can penetrate the ionosphere.
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