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 otherworldly colors of the Northern Lights and Southern Lights have fueled folklore for millennia, but their cause is actually quite straightforward. The aurora is caused by the interaction of high-energy particles (usually electrons) with neutral atoms in earthâs upper atmosphere.This process is similar to the discharge in a neon lamp, or the fluorescence of a television screen. The strongest auroras are quite bright, comparable to moonlight.he atmosphere consists mainly of nitrogen and oxygen, which emit the characteristic colors of their respective line spectra. Atomic oxygen is responsible for the two main colors of green (wavelength of 557.7 nm) and red (630.0 nm). Nitrogen causes blue and deep red hues.