Does Aurora borealis emit light

Yes it does, solarly charged electrons from the sun fall towards Earth at over one million miles per hour, it takes the electrons roughly 40 hours to reach Earth. When they fall towards the magnetic poles the charged electrons collide with nitrogen and oxygen atoms in the gaseous atmosphere, the knock an atom's electron off course and when it returns to the correct orbit the atom releases a photon. Photons are light particles, so yes the aurora borealis does emit light.