A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why?
1. The presence of o

Question

A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why?
1. The presence of ozone causes the reflection of radio waves to Earth.
2. Radio waves have a very long wavelength.
Which of the statements given above is/are correct?

Accepted Answer

The correct answer is D because both statements are incorrect.

Statement 1: The ionosphere facilitates radio communication due to the presence of free electrons and ions, which reflect specific frequencies of radio waves back to Earth. Ozone is primarily found in the stratosphere (the ozone layer) and absorbs ultraviolet radiation; it does not cause the reflection of radio waves.

Statement 2: While radio waves do have a wide range of wavelengths, including very long ones, the reflection of radio waves by the ionosphere is not simply because they have a very long wavelength. The reflection occurs due to the interaction of radio waves with the free electrons in the ionized layers. Different frequencies (and thus wavelengths) are reflected or absorbed at different altitudes and electron densities. The statement does not provide the correct reason for the reflection mechanism.

Answer

1 only

Answer

2 only

Answer

Both 1 and 2

Answer

Neither 1 nor 2

A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why? 1. The presence of ozone causes the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength. Which of the statements given above is/are correct?

Explanation

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