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.
What Makes Northern Lights Happen? The way the Northern Light or aurora works is a lot like a neon sign, except that in the aurorae the conducting gas is in the ionosphere, instead of a glass tube, and the current travels along magnetic field lines instead of copper wires. The power source for aurorae is Solar Wind.