What layer of the atmosphere helps in radio transmission and reflects radio waves back to Earth?

a)
Troposphere

b)
Stratosphere

c)
Thermosphere

d)
Exosphere

Correct answer is option 'C'. Can you explain this answer?

Question

What layer of the atmosphere helps in radio transmission and reflects radio waves back to Earth?

a)
Troposphere
b)
Stratosphere
c)
Thermosphere
d)
Exosphere

Correct answer is option 'C'. Can you explain this answer?

Answer

The correct answer is option C : THERMOSPHERE.
EXPLANATION :-
Thermosphere also known as Ionosphere helps in radio transmission and reflects radio waves back to earth . This layer contains ions. Ions are electrically charged particles formed by the breaking up of molecules of atmospheric gases. They help in wireless communications and radio broadcasting. Hence this layer is also known as
Ionosphere. This layer is also considered as the hottest layer because even absorbing a small amount of heat can significantly increase the temperature of this layer, thus making it the hottest layer.

Answer

The layer of the atmosphere that helps in radio transmission and reflects radio waves back to Earth is called the Ionosphere. It is found between 80-400 km above the Earth's surface.

Answer

Ionosphere:
The layer of the atmosphere that helps in radio transmission and reflects radio waves back to Earth is the ionosphere. This region of the Earth's atmosphere is located between the mesosphere and the exosphere, at an altitude of about 80 to 1000 kilometers above the Earth's surface.

Radio Transmission:
The ionosphere plays a crucial role in radio transmission because it contains a high concentration of ions and free electrons. These charged particles interact with radio waves, allowing them to be transmitted over long distances by reflecting them back towards the Earth's surface.

Reflection of Radio Waves:
When radio waves encounter the ionosphere, they can be refracted or bent back towards the Earth due to the ionization of the atmosphere. This phenomenon, known as ionospheric reflection, enables long-distance communication by bouncing radio signals off the ionosphere.

Importance:
The ionosphere is essential for various forms of long-distance communication, such as radio broadcasting, satellite communication, and shortwave radio. Without the ionosphere, radio waves would quickly dissipate into space, limiting the range of communication technologies.
In conclusion, the ionosphere acts as a natural reflector for radio waves, allowing for global communication and playing a crucial role in modern telecommunications.

Similar Class 7 Doubts

In which layer of the atmosphere does radio transmission occur, helping reflect radio waves back to Earth?

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In which layer do meteorites burn up upon entering the Earth's atmosphere?

Which layer of the atmosphere marks the transition into outer space and is where atmospheric particles gradually escape into space?

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