A-LevelPhysicsWaves9702/12 · Oct/Nov 2023 · Q241 Mark
A plane polarised light wave of intensity I₀ is incident normally on a polarising filter. The initial intensity of the transmitted wave is 0. A second polarising filter is then inserted between the source and the first filter. Its transmission axis is at 45° to the transmission axis of the first filter, as shown. [Figure 24.1] What is the intensity of the transmitted wave from the filter combination?
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A0
BI₀/8
CI₀/4
DI₀/2
✓ Correct answer
C: I₀/4
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