Which of the following layer of atmosphere helps in radio transmission?
Show answer & explanation
Correct answer: D
Explanation
Correct Answer:
Option 4: Thermosphere (especially its lower part, called the ionosphere)
Explanation:
Gas molecules in this layer of the atmosphere become ionized by the sun's harmful radiation, creating a layer of electrically charged particles.
Radio Communication: Radio waves transmitted from Earth are reflected back to Earth after hitting this layer (the ionosphere). This is why long-distance radio communication is possible.
Altitude: This layer extends from an altitude of approximately 80 km to 400 km.
Additional Facts (Characteristics of Other Layers):
Questions are also frequently asked about other layers of the atmosphere:
Troposphere: This is the lowest layer. All weather events, such as cloud formation, rainfall, and lightning, occur here.
Stratosphere: The ozone layer is found here, which blocks ultraviolet rays. This layer is free of clouds, making it ideal for flying airplanes.
Mesosphere: Meteorites coming from space burn up and burn to ashes in this layer.
Possible questions for upcoming exams:
Question: In which layer of the atmosphere is the ozone layer located?
Answer: Stratosphere.
Question: Which is the coldest layer of the atmosphere?
Answer: Mesosphere.
Question: In which layer is the phenomenon of 'Aurora Borealis' (Australis) observed?
Answer: Thermosphere/Ionosphere.