Reply To: polarizer + lcd = ?

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#5060
stupido
Participant

Quicker wat to think.

LCD screens are polarized. Assume vertical.

You have adjusted the circular polarized to vertical.
It is not blocking any of the LCD light. The second layer
divides the light so it is half vertically and half horizonally polarized.

Now you you adjust the linear polarizer to horizonal. It blocks all of the normal LCD light. But half the light through the circular polarizer is now horizonal and makes it through the linear polarizer.