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.
The aurora borealis is also called the northern lights. The aurora borealis most often occurs from September to October and March to April. Its southern counterpart, aurora australis, has similar properties. The cause of the aurora is charged particles from the solar wind, accelerated by the Earth's magnetic field, colliding with atoms in the upper atmosphere causing them to glow as they release their surplus energy.