How is the light we observe as an aurora generated?

Answer

Excited atoms release excess energy as photons when returning to a lower energy state.

When fast-moving charged particles strike atmospheric atoms and molecules, they excite them. As these excited atoms revert to their normal, lower-energy state, they release the excess energy in the form of light photons, which constitutes the aurora.

How is the light we observe as an aurora generated?

#Videos

What Is an Aurora? - YouTube

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