Question : Which of the following statements about the ionosphere is not correct?
Option 1: It contains charged particles.
Option 2: It is ionised by solar and cosmic radiation.
Option 3: Radio waves transmitted from the earth are reflected back to the earth by this layer.
Option 4: It is located immediately above the stratopause.
Correct Answer: It is located immediately above the stratopause.
Solution : The correct option is It is located immediately above the stratopause.
The ionosphere is not specifically located above the stratopause. The ionosphere is a region of Earth's upper atmosphere, starting roughly at altitudes of 30 miles (48 kilometres) and extending upward to several hundred miles (or kilometres). It is characterised by a high concentration of ions and free electrons, which can affect the propagation of radio waves.
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