Long distance propagation of radio waves in the upper atmosphere is most related to which process?
Answer and explanation
Correct answer: Bending of waves by ionised particles
The governing concept is ionospheric propagation. Solar radiation ionises gases in the upper atmosphere, producing charged particles and free electrons. Their changing concentration can refract, bend, or under suitable conditions reflect radio waves, allowing signals to travel far beyond the normal line of sight. Water-vapour condensation, ozone-created rainfall, and ice formation by dust do not provide the relevant communication mechanism. Therefore, option B is correct.
Frequently asked questions
What is the correct answer to this question?
Bending of waves by ionised particles
Why is this the correct answer?
The governing concept is ionospheric propagation. Solar radiation ionises gases in the upper atmosphere, producing charged particles and free electrons. Their changing concentration can refract, bend, or under suitable conditions reflect radio waves, allowing signals to travel far beyond the normal line of sight. Water-vapour condensation, ozone-created rainfall, and ice formation by dust do not provide the relevant communication mechanism. Therefore, option B is correct.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
