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Ground waves are not adversely affected by which of the following factors?

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Ground waves are not adversely affected by which of the following factors?

(a) Conductivity of earth

(b) Dielectric of earth

(c) Lightning strikes

(d) Day/night changes

I had been asked this question in class test.

This intriguing question comes from Radio Propagation and Noise Characteristics in division Terrestrial Radio Navigation System of Avionics

1 Answer

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Correct answer is (d) Day/night changes

Explanation: Propagation of ground waves depends on several additional factors. Some of which are conductivity and dielectric constant of earth. Weather changes like thunderstorms and lightning strikes also create extra atmospheric noise and degrade signal.

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