Answer
Aurora borealis is the northern light while aurora australis is the term for southern light. The Sun emits charged particles - protons and electrons to our atmosphere, where they react with molecules and atoms and excite them. This means that electrons are now moved to their higher energy state. The photon is released when they are back to a lower energy state. In the sky, these photons present as visible light.
Work Step by Step
Aurora borealis is the northern light while aurora australis is the term for southern light. The Sun emits charged particles - protons and electrons to our atmosphere, where they react with molecules and atoms and excite them. This means that electrons are now moved to their higher energy state. The photon is released when they are back to a lower energy state. In the sky, these photons present as visible light.