7.1K views · 336 reactions | Kevlar’s got that Iron Man reputaion, but did you know its properties are somewhere between a liquid and a crystal? Like, the LA girl in me is shook, it’s basically a crystal - just, you know, a bulletproof one…  | Xyla Foxlin | Facebook

1.1M views · 11K reactions | The liquid crystals in the screen change their polarizing orientation depending on the electric field applied through them. If the light passing through the liquid crystal is oscillating at 90 degrees to the polarizing filter, then you will not see light coming through the screen. Video credits @filomin2 #physics #science #samsung | vt.physics | Facebook