Question

It extends between 80 - 400 km. This layer helps in radio transmission.​

Answer 1

Answer:

Ionosphere

Ionosphere is a part of this layer. It extends between 80-400 km. This layer helps in radio transmission. In fact, radio waves transmitted from the earth are reflected back to the earth by this layer

Answer 2

Answer:

Exosphere

80-400 km. This layer helps in radio transmission. In fact, radio waves transmitted from the earth are reflected back to the earth by this layer.