PRACTICE / Malus law

A third polarizer between crossed axes

Unpolarized light of intensity 96 W/m² passes through three ideal polarizers with axes at 0°, 45° and 90°, in that order.

Find the final transmitted intensity.

1. A$12\ \mathrm{W/m^2}$
2. B$0$
3. C$24\ \mathrm{W/m^2}$
4. D$48\ \mathrm{W/m^2}$

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