Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 27

Vertically polarised light of intensity I₀ is incident normally on a polarising filter. The transmission axis of the filter is at an angle θ to the plane of polarisation of the light. The intensity of the light after passing through the filter is I₀/3. What is θ?

1. A8.4°
2. B55°
3. C71°
4. D84°

As printed in the paper