Sunlight which reflects off smooth planes like those of roads or standing water becomes horizontally polarized in the process. Polarizing sunglass are designed to totally block this reflected glare, while at the equal time they reduce the intensity of unpolarized ambient light by one-half.
(a) If a sunglasses lens is to block reflected glare, find what should the orientation of its transmission axis be?
(b) LCD displays, such as flat panel computer display screens, and certainly automobile instruments and digital wristwatch faces, should be readable by people wearing polarized sunglasses. In order for them to be readable, determine what should the transmission-axis orientation of their front "analyzer" filters be?