Seeing your phone’s screen while wearing sunglasses just takes one quick trick

Summer's here, and you're ready for some poolside reading. You grab your phone, put on your sunglasses, and... nothing. The screen is dark, or maybe purplish, even at full brightness. This common problem affects phones, tablets, and computer screens. The culprit? Polarizing filters.

Why Sunglasses Block Screens

Polarized sunglasses reduce glare by blocking horizontally vibrating light waves. Natural light vibrates in all directions, but reflected light (like glare off water) vibrates mostly horizontally. Polarizing lenses let only vertically vibrating light through.

Your electronic devices also use polarizing filters to reduce glare. The problem arises when the polarization of your sunglasses and your screen are misaligned. If your sunglasses block horizontally polarized light, and your screen emits it, the light is blocked, resulting in a dark or black screen.

The Easy Fix

The solution is simple: rotate your screen 90 degrees. This aligns the polarizing filters, allowing the light to pass through to your eyes. While some newer devices have minimized this effect, it's a common issue with many phones and tablets. Enjoy your poolside reading!

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