Jeremy wrote:
Polarized sunglasses only allow light to pass through in a single direction, and your phone screen only emits light in a single direction. Your sunglasses and phone screen end up counteracting each other by working in opposite directions. As a result, you end up seeing a dark or black screen.
Well I can't see any of those durn screens when I'm outside. My phone, camera and handheld GPS are all invisible unless I throw a blanket over my head.