![]() As a result, you wind up seeing a dark or blacked-out image. ![]() Your lenses and screen end up counteracting each other by working in opposite directions. Meanwhile, your phone screen emits horizontally vibrating light while blocking vertical light. What tends to happen is your polarized sunglasses do their job by only allowing light to pass through vertically. LCD screens and sunglasses typically contain a polarizing filter for the same reason: to make it easier for you to see clearly, especially in bright sunlight. ![]() Why you can’t see an LCD screen when wearing polarized sunglasses These molecules absorb any light waves traveling in the direction in which they’re aligned, preventing them from passing through the coating. Polarized sunglass lenses are coated with a chemical compound composed of molecules that are parallel to one another. Natural light consists of protons bouncing in many directions polarized lenses filter that light, causing those protons to travel in a single, uniform direction (usually horizontal). Polarized sunglasses are designed to block glare - overly bright light reflected off shiny surfaces such as water and snow. But so do polarized sunglasses, meaning the two essentially cancel each other out, causing your LCD screen to appear dark or completely black when you look at it. Most LCDs, such as your smartphone and tablet, use a polarizing filter to help you see the screen in bright sunlight. Polarized sunglasses may make it easier and more comfortable to see outdoors, but wearing them while trying to read an LCD (liquid-crystal display) screen can sometimes - literally - leave your eyes in the dark.
0 Comments
Leave a Reply. |