How does the ionosphere help in long distance radio communication?
Answer and explanation
Correct answer: By reflecting radio waves
The governing concept is the interaction between charged upper-atmosphere particles and radio waves. Important ionospheric regions can refract or effectively return certain radio-frequency signals toward Earth, allowing signals to travel beyond the normal line of sight through repeated ground-to-ionosphere paths. Thus option D is the best answer. Rainfall, increased air pressure, and ozone formation do not explain the ionosphere’s communication role.
Frequently asked questions
What is the correct answer to this question?
By reflecting radio waves
Why is this the correct answer?
The governing concept is the interaction between charged upper-atmosphere particles and radio waves. Important ionospheric regions can refract or effectively return certain radio-frequency signals toward Earth, allowing signals to travel beyond the normal line of sight through repeated ground-to-ionosphere paths. Thus option D is the best answer. Rainfall, increased air pressure, and ozone formation do not explain the ionosphere’s communication role.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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