Multiple choice general knowledge

Which layer of atmosphere is responsible for Aurora Borealis?

  1. Troposphere

  2. Thermosphere

  3. Ionosphere

  4. Exosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aurora Borealis (Northern Lights) occurs when charged solar particles interact with gases in the upper atmosphere, causing them to glow. This happens in the ionosphere, which is the region of the atmosphere (extending from about 60 km to 1000 km) where ionization occurs due to solar and cosmic radiation. While the ionosphere spans parts of both the mesosphere and thermosphere, in competitive exam contexts 'Ionosphere' is the accepted answer for auroras.

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