In Maine, vision testing is required at the first renewal after driver's 40th birthday, then at every second renewal until age 62, and thereafter at every renewal. In Oregon, vision testing is required every 8 years for drivers 50 and older. In Illinois and New Hampshire, applicants 75 and older must take a road test.
Bottom line: When charged particles from the sun strike atoms in Earthâs atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora, or northern lights.
They accelerate along the Earth's magnetic field lines which concentrate at the poles. The particles then plunge into the upper atmosphere (3) where they collide with the gases that surround the Earth. These collisions create energy, and the excess energy is given off in the form of light emissions. We call these light emissions the Northern Lights.