SSC CPO 2019 PYQ — Question 59

The correct answer is option 4 i.e. It is located immediately above the stratopause.

Ionosphere:

• The ionosphere is ionized by solar radiation.
• The ionosphere is the ionized part of Earth's upper atmosphere, from about 48 km to 965 km altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere.
• The ionosphere is important because it reflects and modifies radio waves used for communication and navigation.
• The atmosphere of Earth includes five primary layers and a number of minor ones. The troposphere, stratosphere, mesosphere, thermosphere, and exosphere are the primary layers, in order from lowest to highest.