A layer in the Earths 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/ correct?

examrobotsa's picture

Submitted by examrobotsa on

Q: 27 (IAS/2011)
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/ correct?

question_subject: 

Geography

question_exam: 

IAS

stats: 

0,84,173,20,113,40,84

keywords: 

{'ionosphere facilitates radio communication': [0, 0, 0, 1], 'radio waves': [1, 2, 3, 2], 'atmosphere': [1, 1, 4, 7], 'ozone': [3, 0, 3, 5], 'long wavelength': [0, 0, 0, 3], 'layer': [4, 1, 3, 2], 'earth': [0, 1, 1, 1], 'reflection': [1, 1, 2, 19]}

Neither of the statements given above is correct.

The ionosphere is a layer in the Earth`s atmosphere that extends from about 60 km to 1,000 km above the Earth`s surface. It contains ionized particles (ions) and free electrons that can reflect and refract radio waves back to the Earth`s surface, allowing for long-distance radio communication.

The ionosphere`s ability to facilitate radio communication is not due to the presence of ozone, as stated in option 1. Instead, it is due to the ionization of particles in the ionosphere, which allows radio waves to bounce off of them and be reflected back to Earth.

Option 2 is also incorrect because the wavelength of radio waves can vary widely, from millimeters to kilometers, and is not directly related to the ionosphere`s ability to facilitate radio communication.

Therefore, the correct option is: Neither 1 nor 2.

Practice this on app