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Why is the communication using line of s...

Why is the communication using line of sight mode limited to frequencies above 40 MHz?

Text Solution

Verified by Experts

The electro magnetic waves of frequencies
greater than 40 MHz can not be reflected by
ionosphere. Due to it, their sky wave propagation
is not possible. Moreover these high frequencies
waves are greatly absorbed while moving over
the surface of earth. Therefore, their ground wave
propagation is possible. As a result of it, such
waves can only propagate by the line of right
mode.
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