Q. The VISUAL aurora consists of luminous arcs, rays or bands in the night sky, usually confined to high latitudes and located in the

A
troposphere
B
stratosphere
C
ozonosphere
D
ionosphere
Solution:

The ionosphere is defined as the layer of the Earth’s atmosphere that is ionized by solar and cosmic radiation. It lies 75-1000 km (46-621 miles) above the Earth. (The Earth’s radius is 6370 km, so the thickness of the ionosphere is quite tiny compared with the size of Earth.)

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