LateralRiddle #1398
Whenever Ann tilts her head while wearing her new sunglasses, her car's dashboard screen goes completely black. Straighten up, and it's back. Nothing is wrong with the screen. Why?
Hint: The screen is fine. Look at what's on Ann's face.
Answer
Her sunglasses are polarized, and they block the polarized light the screen gives off at certain angles.
Polarized lenses and LCD screens both filter light in one direction, so at the wrong angle they cancel out.
Did you get it?
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